Puts (experimental) webserver feature into own module
Refactored CSS input and dependency parsing

Hopefully a step in the right direction to correctly
support scss. Import handling is quite tricky. The watchdog
should now work correctly for
Preparation for a full featured CSS Parser. Merge features
from sprite generator and generic css/scss handling. This
will enable new and advanced options for the css optimizer.
Adds minor fix to suppress warning message
Adds more specific options for css import and url rebase
Reverts regular expression for css comments
Don't remove comment when rendering css (spritesets)
Merge branch 'master' of https://github.com/mgreter/webmerge