[TASK] Remove a no longer required overridden RealUrl class
[BUGFIX] Avoid analysis attempt on controller classes which do not exist
[DOC] Incomplete class name in throws annotations
[TASK] Add missing "Nullify" conversion method
[DOC] Fix incorrect type annotation
[BUGFIX] Use realurl's method to convert titles

Fixes: #3
[BUGFIX] Incorrect variable used to check if RealUrl encode result was empty
[BUGFIX] Proper SQL query to select plugin instance page UIDs