Updating bundled version of less compiler to latest released version

Closes gh-45.
Fixed proper error handling since async.forEach => async.forEachSeries

Closes gh-47.
version bump
Date typo in changelog
Merge pull request #48 from contolini/master

Changelog typo
Bump to LESS 1.4.0.

Closes gh-51.
version bump
fix failing test
Expose ieCompat option present in LESS 1.4.0

For more information
https://github.com/cloudhead/less.js/pull/1190

Closes gh-53.
version bump
Expose `syncImport` option in task

This option forces node/less.js to read files synchronously from disk (using `readFileSync`). Reading files async on Windows is rather dodgy and we're having huge problems right now when not using this option.

Closes gh-62.
version bump
Fix CRLF
Add report option for minification and gzip results. Closes GH-61.
Update copyright to 2013
Bump v0.6.3
Added relativeUrls as a valid option

Closes gh-49.
version bump
Add strictMath to LESS options. Closes GH-67.
Parse rootpath. Closes GH-66.