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