Add manual registration and provision documents for Flyingvoice IP phone. (#217)

* Add manual registration and provision documents for Flyingvoice IP phone.

* Add manual registration and provision documents for Flyingvoice IP phone.

* Add manual registration and provision documents for Flyingvoice IP phone.

source/applications/provision/provision_auto_flyingvoice.rst

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+Flyingvoice 
+============================
+
+
+To configure the Flyingvoice phone do the following steps.
+
+* Once the phone powers up, press the OK button once and the phone will display its IP address on the screen.  Navigate to that IP on another device in a web browser, and use admin for the username and admin for the password.
+* Click the **Administration** tab at the top
+* Click the **Provision** tab at the top secondary menu.
+* Under **Configuration Profile**, fill in the **Profile Rule** field.  This will be https://domain.tld/app/provision  Replace domain.tld with your actual domain name.
+* Click **Save & Apply.**
+
+.. image:: ../../_static/images/provision/fusionpbx_auto_flyingvoice_provision.png
+        :scale: 85%

source/applications/provision/provision_manual_flyingvoice.rst

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+#########
+Flyingvoice 
+#########
+
+Setting up a **Flyingvoice** SIP phone through the phone's local http management portal. 
+
+* Once the phone powers up, press the **OK** button once or **Menu** > **Status** and the phone will display its IP address on the screen.  Navigate to that IP on another device in a web browser, and use **admin** for the username and **admin** for the password.
+
+.. image:: ../../_static/images/provision/fusionpbx_manual_flyingvoice_login.png
+        :scale: 85%
+
+* **Enter the following information for each Account that is required:**
+* Click the **SIP Account** tab at the top menu.
+* Click the **Line 1** tab at the top secondary menu.
+* Set **Line Enable** to enabled.
+* Set **Display Name** to the user's name or the extension number, or both, ie "1000".
+* Set **Account** to the users FusionPBX extension number, in this case 1000.
+* Set **Phone Number** to the users FusionPBX extension number, in this case 1000.
+* Set **Password** to the users FusionPBX password.
+* If you would like to use TCP transport, set **Trasport** to TCP.
+* Under **Proxy and Registration**, set the **Proxy Server** to your FusionPBX domain for that extension.
+* Set **Voice Mailbox Numbers** to *97
+* Click **Save & Apply.**
+
+.. image:: ../../_static/images/provision/fusionpbx_manual_flyingvoice_reg.png
+        :scale: 85%
+
+