unapi scripts, and a wiki page

I updated several thing regrading unapi:

-- fix a bug in unapi userscript

-- update a proxy demonstration to unapi revision 3.

-- I started a wiki page in http://unapi.stikipad.com/, although a personal opinion, I think it is a good idea to document commonly used format in unapi, largely motivated by a similar microformats list. Feel free to update the wiki page if you have comments/ideas.