[lang] - add new strings for for the new "allow volume control" setting in airplay
[settings] - add new setting for airplay - "allow volume control"
[airplay] - only allow volume changes if the new corresponding setting is enabled
Merge pull request #3028 from Memphiz/airplayvolume

[airplay] - add setting for allowing/disallowing volume control from airplay clients
Adding JSON-RPC support for Profiles operations to XBMC.
Adding Profiles support to the XBMC default web interface.
Adding support for password protected profiles.
User may supply a password or may ask to enter password.
GetCurrentProfile added.
Getting a profile Lockmode added.
Added an option to send the password as md5 hash (this is the default behavior).
One can still send the password as plain text if he chooses to.
I left this option since some clients may not have an implementation of the md5 algorithm.
Applying some fixes.
Preparing to rebase.
Updating ProfilesOperations to use ProfilesManager.
Fix XBMC.vcxproj.filters file
Updating Copyright message
Changing EOL to LF explicitly
Fixed comments from code review on 28/7/2013
Fixed comments from code review on 3.8.2013
Update methods.json
Fixed merge bug in MediaLibrary.js