Fixes#64
All pages:
- add `urlencode` when passing the version to a custom stylesheet;
- set meaningful values of `alt` and `title` for QR-Code images.
Install page:
- the form's `action` attribute must be non-empty;
- the `valign` attribute is deprecated.
Signed-off-by: VirtualTam <virtualtam@flibidi.org>
jQuery has been removed from all pages, except those who really require
it (like autocomplete in link edition).
Immediate gain: All pages weight 286 kb LESS ! \o/
Highlighting in search results has also been temporarly removed (and
will be re-implemented).
Shaarli uses light Javascript in its normal operation, and some jQuery
for some features (autocomplete in tags, QR-Code popup...).
jQuery can be slow on small computers. An option has been added in
configuration screen to disable javascript features which are hard on
CPU.
(Note that the Picture Wall is awfully heavy *without* jQuery.)
(Side note: A *LOT* of users want Shaarli to work without javasript at
all, if possible. That's why I try to use as few javascript as possible:
It keeps Shaarli pages fast.)
