Version 0.5

* Added error notice that displays upon plugin activation if OPcache isn't enabled
* Fixed bug where error would display if opcache_get_status function didn't exist

Version 0.4

* Added notice that displays upon plugin activation

Version 0.3

* Added OPcache page in Settings menu showing OPcache details
* Added popup saying OPcache was cleared or if OPcache is disabled