Fix: close the HTML when search is aborted
Add initial requirements

They are probably still not complete, but feels like a good start.

Part of #29
CSS cleanups

Apply Pootle styleguide despite we still didn't agree if that is the one
that should be used.

Also changed color declaration to use three characters when possible and
use lowercase letters.

Fixes #49
HTML cleanups

* Use double quote for the attributes values
* Removed spaces between attribute and its value
* Removed trailing blank spaces
* Use two spaces indent
* Close void tags using a solidus (like <br />)
* Added missing closing tags
* Use the same attributes order for <link> tags (eases comparing them)
* Tried to wrap at 80 chars
* Removed blank lines at end of document

Fixes #48
UNDO