[Doing-222]Added player plugin and native iOS files
[Doing-222][iOS] Refactored XPlayerSystemBootstrap

1. Removed the process of app resource deploy, instead load
<Application_Home>/Documents/xface3/apps/helloxface directly
2. Since we have stopped supporting ‘xface_player.zip’, XSync no longer
applies，removed it.

Reference:
https://trello.com/c/tOmR8XXH
[Doing-222][iOS] Removed UsePlayerMode preference and added the Player-Related files
add wp8 xfaceplayer mode source code
[android]add xface-lib-plugin-player
[Done-240][iOS] Since player version info has been added onto splash screen, removed the outdated TODO
[Doing-261] Rename xface-lib-plugin-xxx to xface-extra-xxx
[android]Show version number in splash screen when portal is launching
Modify description and id in plugin.xml