Completely rewrote browser script.

* Added Firefox support
* Script no longer polls indefinitely if no comments are found
* Does not use jQuery anymore
* Added @gant meta header
* Set version to 0.2.0

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
el: Add autoloads and don't override org-protocol-protocol-alist.

Use add-to-list instead.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
el: Added defcustom and fixed comments.

Also removed bad default.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
el: Added org-protocol-github-project-directories to find projects.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>