if plugin method get_css(), embed plugin-specific css to main UI
upgrade dojo to 1.8.3 (refs #570)
dojo: add some more controls to the layer
replace jsmin with jshrink
cache minified js files
add plugin based on google reader css at http://tt-rss.org/forum/viewtopic.php?f=22&t=1287&start=15#p5956
in combined mode, when viewing vfeeds relative urls are rewritten incorrectly (fixes #586)
googlereadertheme: check for UID being present
Merge remote-tracking branch 'upstream/master'