Loader and canonicalization implementaion WIP.
Updated Travis service listing and corrected situation for Python 3.2 and pypy3.
Simplification of the code, removal of dead imports.
Additional simplification, full confirmed coverage and added pragmas.
Some more cleanup and new modules.
Added tests for traversal.
Full testing of the loader module.
Cache fully tested.
Dur, Tox does not install itself into the venvs; removed dead code.
Added tarjan sort and tests.
Added PluginManager/ExtensionManager with ordering capability.
Additoinal tests.
Full coverage.
Huh, apparently iter was not a thing in py26.
Documentation.
I hate reST.
1.0 version bump.
Merge branch 'release/1.0.0'