Changed ‘->’ to ‘→’ in history view.
Better looking typographic quotation marks for the selected branch.
Nicer quotes in preferences view.
Keep a reference to the add remote sheet while the file browser is open

Fixes #366, closes #370
Add fix for #366, #370 to the change log
Always fire watcher events when a non-ignored file is changed
Merge pull request #367 from Debilski/feature/styling

Some stylistic/typographic changes.
Add pull request #367 to the change log.
Change inconsistent "SHA" uses to "OID"
Just use the ref's OID directly.
Use URLs for locating the working directory.
Private ivars go in class extensions.
Property-fy PBGitIndex.
Move some common actions up in the responder chain.