More additions & fixes

+ Mango Cache additions
+ Mango Reader updates
+ Mango_Collection v0.4.5
+ Cerber Theme updates
+ Cleez Core fixes
+ Num fixes
+ Now userguide must be enabled or disabled from admin dashboard
+ Removed not needed install check
+ Use `Cache::delete_all` instead `Gleez::cache_delete`
+ Fixed `Cache_Memcache`