Changed expectations of includer.

Now it expects to get a file extension instead of a full path.
Which makes the includer plugins much much simpler.
Fixed a destination problem.
And bumped version.
Corrected version to a prerelease.
Removed old context file.
Cleaned up the utils and added a common reader.
Reworked reading to use the common reader.
Removed impossible import.
Removed commented out code.
Added function to strip the leading folder.
Sending content and a suggested path to plugins.

They can then manipulate both if needed.
Fixed mistake of calling the handler.