Http Session support added (see LessCssHttpHandlerFactory, DotlessSessionStateMode), minor changes/fixes:
- upgrade related paths added to gitignore;
- ConfigurationManager.GetSection wrapped in IConfigurationManager impl;
- Mock<IConfigurationManager> and Config:DotlessConfiguration added to HttpFixtureBase;
- possible ArgumentOutOfRangeException fixed in Rule.
Add new keep comment option. fixes #209
Remove error message giving away path location if not accessing from the local machine
Message is using Less.Parse for web projects to use new LessWeb.Parse. Fixes #217
Recognise .less.css files as less, not css
fix typo so files are added to the cache dependency fixes #218
Allow comparing colours in mixin guards
Add argb function. Fixes #233
Make it easier to compile an entire directory by not requiring the command-line arguments to end with a directory separator.
Since that's also an escape sequence, it gets ugly when quoting paths.
GradientImage function added; Minor fixes

GradientImage function:
-- see RFC-2397 - The "data" URL scheme - http://tools.ietf.org/html/rfc2397
-- usage: gradientImage(#color1, #color2[, position2][, #color3[, position3]]...)

- ColorFunction raises meaningful ParsingException;
- Compression related fixes;
- Minor fixes
- junk assembly references removed.
Fix name of GradientImageFixture class
Allow comparing textnodes in mixin guards
unit test for comparison between function result and number
Support for viewport
fix parsing of quality value to be of invariant culture
Fix bug in media selectors. Port from less.js
fix error with mixin call being recognised as mixin definition when call contains spaces and interpolated strings. less.js issue 901.
Add missing argb functions to the project for.
Fix #235 by writing headers only once when there is an error
Add test case for 247