First test scenario added.
First test scenario added.
Implemented basic functionality tests.
Improved test for insert.
Bugfixes for reorder keys alongside the tests for it.
Added test for representation.
Merge branch 'master' of https://github.com/JustusW/BetterOrderedDict into JustusW-master

Resolve merge conflicts.

Conflicts:
	better_od/core.py
Merge branch 'JustusW-master'

Using Justus' changes.
Conflicts:
	better_od/core.py