Fixes #531

Resize sprite sheet slightly to fix alignment issues

Added webkit vendor prefix.
Shortened the animation length slightly.
Removed highlight from Candy theme due to image background.

Closes #193.

Stuff sometimes jumped down to next line in Chrome.

Add left padding to search field.
Slight refactoring of background CSS.
Closes #218, closes #221.

Fixed #206.

Fixes #195.

Fixes #190

Added horizontal lines in Snow theme and increased spacing in
Classic/Candy themes to help distinguish between each plugin and its
options.

From PRs by @pupi1985 (unmergeable due to file structure changes).
Closes #69.
Closes #126.

Set to Unix line endings in repo; the gitattributes file means they
will be converted to suit the user’s system.