Add link to add site to the wiki

So that more people will do it and it'll take less time. As long as we trust people, that's good.
leave some hints about OP3.0 (not mentioned on imathis/octopress and not at octopress.org )
Rakefile: use source_dir when setting url via CNAME
Google broke old site-search method, this fixes it
Fix the way of loading the local copy of jQuery

Deleted the dot at the beginning of the path in the script that called the local copy of jQuery.
Merge pull request #1699 from VincentTam/jquery-ref

Fix the way of loading the local copy of jQuery
Merge pull request #1687 from blbradley/rakefile-cname-sourcedir

Rakefile: use source_dir when setting url via CNAME
Merge pull request #1682 from muescha/patch-1

leave some hints about OP3.0
Merge pull request #1678 from Blaisorblade/patch-1

Add link to add site to the wiki
Merge pull request #1657 from enriquesaid/master

updated compass
Merge remote-tracking branch 'upstream/master'

Conflicts:
	.themes/classic/source/_includes/head.html
	.themes/classic/source/_includes/navigation.html