Update CSS for new React GitHub layouts.

Add new CSS selector to fix some JS-based page loads

Fix width on file viewer

Fix Your Branches page

Fix style not applying when page is loaded via JS vs a full refresh

Remove unused CSS selectors, fix commit history page

Bump version number

Merge pull request #78 from xthexder/assignee_fix

Fix selectors to work with new GitHub turbo-frame usage

Merge pull request #76 from xthexder/assignee_fix

Assignee alignment fix

Update to version 1.5.0