Added support for params to the LESS filter.
Merge pull request #151 from RubenVerborgh/less-params

Add support for params to LESS filter
merged changes from release-3.4.x branch
fixed 'passthrough' rule routing
Merge pull request #153 from gpakosz/fix-passthrough-routing

fixed 'passthrough' rule routing
added checker dsl
merged changes from 3.4.x branch
refactored error handler
refactored show-data command (still not ideal)
refactored show-data command more
refactored check command
refactored atom_feed method in blogging helper
refactored check command more
refactored atom feed builder
refactored check command
Add support for Atom icon.
Add support for Atom logo.
Merge pull request #160 from RubenVerborgh/atom-icon-logo

Support Atom icon and logo
removed severity from checkers (keep it simple)
Remove unused constant