Changed styling on index.html
Added watch for css
Merge pull request #11 from Counterkitten/master

UI changes for xml-signer
Finished visual redesign. Smoothed out authorization process.

Changed default expiration time to 120 days.
Allow tool to pass in a user key to use by default.
Add support for unencrypted keys -- Do not show passphrase box for them, never store them on the disk.