Improved content animations.

Several improvements, including change of content animations so as to not visually clash with PathBar's animations.
Closes #4.
About page changes.

Changed the icon and text of the G+ button to indicate that it's just the community, and not necessarily the beta, they'll navigate to.
Fixed a bug in finding path diffs.

Also added tests for this and fixed code using it.
Changed readme.
Changed readme.
Upped version to 1.0.0 b2.