Update package.json

https://github.com/less/less.js/tarball/1.5.0-wip no longer exists
updating to pull 'master' branch
Merge pull request #15 from pwaleczek/patch-1

Update package.json
Merge branch 'pwaleczek/master'

Conflicts:
	package.json
Merge pull request #17 from pwaleczek/master

removed yuicompress options because it is no longer suported by less >= 1.5.0-b1
0.5.2
Restore banner parsing. Also updates options.banner with grunt.template.process'ed banner. Includes and actually runs tests for all banner-related options. Individual test dependencies for `stripbanner` and `banner`. Fixes assemble/assemble-less#18
Merge pull request #19 from MarcDiethelm/parse-banner

Restore banner parsing. Fixes #18
0.5.3
fixes whitespace diff that was causing a test to fail
add reference target, add license and copyright to more comments
fixes #20