SpecialMobileWebApp: Make styles and startup scripts cache

Change-Id: I877b38017c51b3b40f35de5ab1bf9381cae39ca6
SpecialMobileWebApp: Get the startup module caching

* Note without memcached setup the app will not cache:
Be sure to have:
* $wgMainCacheType = 'memcached-pecl'; 
* $wgMemCachedServers = array( '127.0.0.1:11211' );

Change-Id: I2ee549e503e706ead68e223fb59e6aec34843a91
Merge "SpecialMobileWebApp: Make styles and startup scripts cache"
Merge "SpecialMobileWebApp: Get the startup module caching"