Failing test for alpha numeric variable value
Merge pull request #371 from stoiveyp/master

Initial support for Extend
Created unit test for the default one week expiry header for the CachedCssResponse
Added configuration property for how far in the future that the expires header should be set
renamed the configuration property for the expiry header length to make it more obvious what it is for
Merge remote-tracking branch 'issue-368/alpha-numeric-dom-id-variable'
Copy DisableColorCompression to child in CreateChildEnv
Fixed #368 - space rendered in a variable result. Fixed it by expanding the Keyword parser to also accept numbers.
Added data-uri function to inline resources in CSS files
constrast function modified to use luma instead of lightness and default threshold changed to 43%
Add logit to contrast function to check for the actual dark and light colors, and swap if neccessary
Merge branch 'david-poirier-csn'
Merge branch 'master' of https://github.com/stoiveyp/dotless into stoiveyp-master
Merge branch 'stoiveyp-master'
Fixed the issue which reported https://github.com/dotless/dotless/issues/312 and https://github.com/dotless/dotless/issues/305. Almost all the unit tests work fine except 'CommentsInVariableRuleAccepted', but I think it is acceptable.

Conflicts:

	src/dotless.Core/Parser/Tree/Ruleset.cs