add support for rel=self links in generic_rss function (not used yet)
Use rel=self link for main RSS feed
Fix #264
Fix #647
we don't support python 2.5 anymore
Compile less files directly to the output dir, instead of theme dir.
Merge pull request #651 from punchagan/fix-less-dst

Compile less files directly to the output dir, instead of theme dir.
Merge pull request #646 from ralsina/rel-self-rss

Improve RSS feed interoperability
Fix bundles when using less files.

Change the file_deps to the output folder, since #651 changed the
build_less to write files directly to output directory, and copy
assets should've already run, when we are building bundles.
Add explicit task dependency on copy_assets for build_bundles
Merge pull request #652 from punchagan/fix-less-dst

Fix bundles when using less files.
Merge branch 'master' of github.com:ralsina/nikola into kill-post_pages
fix tests