[docs] Prepare v0.6-dev3 release.
[release] 0.6-dev2
v0.5.6.1 release.
Merge branch 'v0.5.6'
Merge branch 'v0.5.5'
Fix broken PyPI upload (sorry\!).
Fix inconsistent version numbers.
Finalize v0.5.2 release.
Add opencv as an extra dependency. Update download page. See Breakthr… …ough#111.
Update website version number.