Move test files.
Move refcounting tests to their own file.
Clean up tests and add packaging things.
Unrelated cleanup.
Improve coverage.
Make bench not rebuild all deps.
Fix bench to run under correct python version for travis.
Merge pull request #46 from bukzor/tox

Tox
Allow one to opt-out of bench/runbench
Improve coverage of Unicode_test.
Kill I18n macro.
Merge pull request #48 from bukzor/kill_I18n_macro

Kill I18n macro.
Improve coverage by deleting code.
Merge pull request #49 from bukzor/improve_coverage_slightly

Improve coverage by deleting code.
WIP (python3)