+ added replaceLast(String, String, String) test
+ added check if the integrated plugin manager is enabled
? fixed StringUtil#replaceLast(String, String, String)
changed some stuff and changed it back
Changed something and changed it back again.
? fixed error if no tab completers are registered for the executed
command
~ changed plugin.yml organization
+ added collection util
+ added collection util test
+ added some code comments
~ code cleanup (added final modifiers, refactored some stuff)
- removed author-tags on Class-JavaDoc
? fixed JavaDoc warnings (missing JavaDoc)