Use root_path in sse URL

Change toolbar mako file so that sse urls use the passed in root path rather than assuming the toolbar is at /.
Merge pull request #192 from stevepiercy/master

update docs theme
Merge pull request #194 from stevepiercy/master

Add section Panels and UI Extras for user contributions
update links and description for extras
Merge pull request #195 from stevepiercy/master

update links and description for extras
better way of fixing the SqlAlchemy explain/select issue and ensuring javascript libraries are available to all templates
only jquery need to be loaded first.
Merge pull request #198 from jvanasco/issue_146_alt

fixed issue_146 by incorporating the bootstrap reset and reordering javascript files
Merge pull request #185 from dscerri/master

Use root_path in sse URL
Merge branch 'master' of github.com:Pylons/pyramid_debugtoolbar into jv_headerlink
use new `root_path` variable, from #185