Add chemdoodleweb framework.

GPL licensed (with extra clause).

From http://web.chemdoodle.com/installation/download
Anything left of the terminus, not start, of the arrow, should be considered a reactant.
Move chemdoodle stuff to js.
unminify
Looking towards introducing chemical structures. So we now have "experiment types", including chemical ones.

This might want to be a database thing, like "items" and "templates" are now. In fact, maybe make "chemical" a bool on templates.

Also have chemical structure drawing tool in edit page. It's there but it doesn't do anything, and it breaks the tinymce editor.
Upgrade jquery and remove old version in ChemDoodleWeb-libs.js. This makes chemical and text editor play nice together.
ignore unminified versions of jquery for debugging.
unminify sketcher for debugging
Reaction schemes can now be saved and are loaded in the edit view.