Added CONTRIBUTE.md
License
Added leading zero option
Update README.md: some options

always-semicolon.js
block-indent.js
colon-space.js
Merge pull request #46 from ignovak/leading-zero

option: leading-zero
Added unitless zero option
Merge pull request #43 from ignovak/unitless-zero

Added unitless zero option
Added color-case option
Merge pull request #44 from ignovak/color-case

option: color-case
Added color-shorthand option
Fix filename for strip-spaces test
Merge pull request #45 from ignovak/color-shorthand

Added color-shorthand option
Changelog added
Added an alternative way of setting the colon-space option
Made `\s` more specific
Added more colon-space examples to README
Fixed example with `\n\t\t`
Merge pull request #47 from kizu/colon-space

Added an alternative way of setting the colon-space option
Config options alphabetically sorted
Contributor: Igor Novak