Started improving FileLoader doc

docs/api/loaders/Cache.html

@@ -24,7 +24,7 @@
 
 		<h2>Usage</h2>
 
-		<div>To enable caching  across all loaders	derived from [page:FileLoader], set</div>
+		<div>To enable caching across all loaders	that use [page:FileLoader], set</div>
 		<code>
 THREE.Cache.enabled = true.
 		</code>

docs/api/loaders/FileLoader.html

@@ -11,16 +11,47 @@
 
 		<h1>[name]</h1>
 
-		<div class="desc">A low level class for loading resources with XmlHttpRequest, used internaly by most loaders.</div>
+		<div class="desc">
+			A low level class for loading resources with XmlHttpRequest, used internaly by most loaders.
+			It can also be used directly to load any file type that does not have a loader.
+		</div>
+
+		<h2>Example</h2>
+		<div>
+			[example:webgl_loader_msgpack WebGL / loader / msgpack]<br />
+			[example:webgl_morphtargets_human WebGL / morphtargets / human]<br />
+		</div>
+		<code>
+var loader = new THREE.FileLoader();
+
+//load a text file a output the result to the console
+loader.load(
+	// resource URL
+	'example.txt',
+
+	// Function when resource is loaded
+	function ( data ) {
+		// output the text to the console
+		console.log( data )
+	},
+
+	// Function called when download progresses
+	function ( xhr ) {
+		console.log( (xhr.loaded / xhr.total * 100) + '% loaded' );
+	},
+
+	// Function called when download errors
+	function ( xhr ) {
+		console.error( 'An error happened' );
+	} );
+		</code>
 
 		<h2>Constructor</h2>
 
 		<h3>[name]( [page:LoadingManager manager] )</h3>
 		<div>
-		[page:LoadingManager manager] — The [page:LoadingManager loadingManager] for the loader to use. Default is [page:LoadingManager THREE.DefaultLoadingManager].
-		</div>
-		<div>
-		Creates a new [name].
+		[page:LoadingManager manager] — The [page:LoadingManager loadingManager] for the loader to use.
+		Default is [page:DefaultLoadingManager].
 		</div>
 
 
@@ -28,36 +59,61 @@
 
 		<h3>[property:Cache cache]</h3>
 		<div>
-		A [page:Cache cache] instance that hold the response from each request made through this loader, so each file is requested once.
+			A reference to [page:Cache Cache] that hold the response from each request made
+			through this loader, so each file is requested once.<br /><br />
+
+			<em>Note:</em>The cache must be enabled using
+			<code>THREE.Cache.enabled = true.</code>
+			This is a global property and only needs to be set once to be used by all loaders that use FileLoader internally.
 		</div>
 
+		<h3>[property:String mimeType]</h3>
+		<div>
+			The expected [link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types mimeType].
+			See [page:.setMimeType]. Default is *undefined*.
+		</div>
+
+		<h3>[property:String path]</h3>
+		<div>The base path from which files will be loaded. See [page:.setPath]. Default is *undefined*.</div>
+
 		<h3>[property:String responseType]</h3>
+		<div>The expected response type. See [page:.setResponseType]. Default is *undefined*.</div>
+
+		<h3>[property:String withCredentials]</h3>
 		<div>
-		Can be set to change the response type.
+			Whether the XMLHttpRequest uses credentials  such as cookies, authorization headers or
+			TLS client certificates. See [page:.setWithCredentials] and
+			[link:https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/withCredentials XMLHttpRequest.withCredentials].
+			Default is *undefined*.
 		</div>
 
 
+
 		<h2>Methods</h2>
 
 		<h3>[method:null load]( [page:String url], [page:Function onLoad], [page:Function onProgress], [page:Function onError] )</h3>
 		<div>
 		[page:String url] — required<br />
-		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded text response.<br />
+		[page:Function onLoad] — Will be called when loading completes. The argument will be the loaded response.<br />
 		[page:Function onProgress] — Will be called while load progresses. The argument will be the XmlHttpRequest instance, that contain .[page:Integer total] and .[page:Integer loaded] bytes.<br />
-		[page:Function onError] — Will be called when load errors.<br />
-		</div>
-		<div>
+		[page:Function onError] — Will be called if an error occurs.<br /><br />
+
 		Begin loading from url and return the [page:String text] response that will contain the data.
 		</div>
 
-		<h3>[method:null setCrossOrigin]( [page:String value] )</h3>
-		<div>
-		[page:String value] — The crossOrigin string to implement CORS for loading the url from a different domain that allows CORS.
-		</div>
+
 
 		<h3>[method:null setResponseType]( [page:String value] )</h3>
 		<div>
-		[page:String value] — the empty string (default), "arraybuffer", "blob", "document", "json", or "text".
+		[page:String value] — the response type. Default is '' (empty string).<br /><br />
+
+		Change the response type. Valid values are:<br />
+		[page:String text], empty string (default), or any other value. Any file type, returns the unprocessed file data.<br />
+		[page:String arraybuffer] - loads the data into a [link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer ArrayBuffer] and returns that.<br />
+		[page:String blob] - returns the data as a [link:https://developer.mozilla.org/en/docs/Web/API/Blob Blob].<br />
+		[page:String document] - parse the file using the [link:https://developer.mozilla.org/en-US/docs/Web/API/DOMParser DOMParser].<br />
+		[page:String json] - parse the file using [link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse JSON.parse].<br />
+
 		</div>
 
 		<h2>Source</h2>