more docs about adding new commands

docs/Devel.md

@@ -9,8 +9,27 @@ Kamailio Command Line Interface Control Tool
 
   * user 4 whitespaces for indentation
 
+#### Used Frameworks
+
+Kamcli is using the following Python frameworks:
+
+  * click - command line interface framework
+    * http://click.pocoo.org
+  * SQL Alchemy - connection to database
+    * http://www.sqlalchemy.org
+  * pyaml - yaml package used for compact printing of jsonrpc responses
+  * tabulate - pretty printing of database results
+
 #### Plugins
 
+Kamcli prototype is:
+
+```
+kamcli <command> [params]
+```
+
+Each command is implemented as a plugin, its code residing in a single Python file located in *kamcli/commands/*. The filename is prefixed by **cmd_**, followed by command name and then the extension **.py**.
+
 Development of kamcli has its starting point in the *complex* example of Click:
 
   * https://github.com/mitsuhiko/click/tree/master/examples/complex
@@ -19,9 +38,20 @@ Other examples provided by Click are good source of inspiration:
 
   * https://github.com/mitsuhiko/click/tree/master/examples
 
-In short, thttps://github.com/mitsuhiko/click/tree/master/exampleshe steps for adding a plugin:
+##### Adding a new command
+
+In short, the steps for adding a new command (refered also as plugin):
+
+  * create a new file file for your new comand in **kamcli/commands/** folder
+  * name the file **cmd_newcommand.py**
+  * define **cli(...)** function, which can be a command or group of commands
+
+Once implemented, the new command should be immediately available as:
+
+ ```
+ kamcli newcommand ...
+ ```
 
-  * add you new comand in kamcli/commands/ folder
-  * name the file cmd_newcommand.py
-  * define cli(...) function, which can be a command or group of commands
+The commands **dispatcher** (kamcli/commands/cmd_dispatcher.py) or **address** (kamcli/commands/cmd_address.py) can be a good reference to look at and reuse for implementing new commands.
 
+If the new command is executing MI or JSONRPC commands to kamailio, add the appropriate mapping inside the **kamcli/iorpc.py** file to the variable **COMMAND_NAMES**. The recommendation is to use the RPC command as the common name and then map the MI variant.