Update package.json

updated the clean-css dependency because this version caused problems when generating a styleguide from CSS when the first characters in the CSS file are @charset .  This line is generated in my case.  I updated the version of clean-css and everything worked fine.
Handlebars version 1.0.5beta -> 1.3.0 (fixes #44)
Convert Windows CRLF into Unix LF line endings.
Merge pull request #60 from JohnAlbin/line-endings

Convert Windows CRLF into Unix LF line endings.
Merge pull request #55 from hansjorg/upgrade-handlebars

Handlebars version 1.0.5beta -> 1.3.0 (fixes #44)
Merge pull request #43 from emcpadden/master

Update package.json to fix CSS generation when generating from css where @charset is first in css file