Updates on testing

This release contains updates to the testing system, bringing the code in line with present day Go as of release time.

Unification of code. Expansion of Junk feature.

UnifiedDiff and ContextDiff are now aliases for LineDiffParams.

Junk functions are available for LineDiffParams.

Basic performance changes

Some methods tweaked to allocate fewer strings.

The StructuredDump method has been added. StructuredDump behaves like Dump, except that it returns a DiffLine structure instead of a string.

README update

Merge pull request #3 from ianbruene/differ

Fixed missing Differ init in README.

New owner and features

Ownership of project transferred to Ian Bruene.

Port of Differ class added.