Improved context in error warnings

Summary

Currently MythicMobs will tell you that you have an error, but does not help you locate in which file the error is.

Usage

It would be used to help track down the location of bad mechanics/mobs

Value

Greatly decreases the time required to find errant lines of code when debugging.

Priority

I would put this at medium-high priority, it would really help everyone out from common users to QA staff.

Implementation

Add a segment to the error message that <error> is located in <file>.<extension>