Update README.md
Fixed recursive mixin regression, updated tests to detect such regression in future.
Fix error message when using cleancss with sourcemap
reworked internal decimal rounding function.
Throwing an error now on `writeError` if `silent`option is not set to give users of the API the possibility to distinguish between a successful compilation and an unsuccessful one without needing to parse the output.
Merge pull request #1936 from danielchatfield/fix-error-message

Fix error message when using cleancss with sourcemap
Merge pull request #1929 from seven-phases-max/recursive-loop-regression-fix

Recursive mixin calls regression fix.
Merge branch 'master' of https://github.com/sandroboehme/less.js into sandroboehme-master
improving paths determination during file loader, less likely to pass undefined and break node
Added condition to check if HEX code contain only valid characters
fix bug with ../.. paths joining
Merge pull request #1974 from dominicbarnes/master

Change paths determination for CLI
Merge pull request #1981 from kolipka/master

fix bug with ../.. paths joining
Ignore quote type when comparing values. Fixes #1992
Merge branch '1924-fix-1' of github.com:seven-phases-max/less.js
add comment, make + clearer by changing to Number constructor
Switch to a different js error as the text is different in new versions of node
make some changes suggested in #1107 to improve open file handles
Added more flexible check for HEX color code. Also error is now less specific.
Added another test case for missed space in color definition