Fixed issue #45

2x Performance improvement after code profiling.

Backported performance improvements made in v4.1.0

Include new CLI runner definition in README.

v3.3.0 release changes. Read changelog.

v3.2.0 release changes. Read changelog.

Huge performance imrpovement after code profiling. Long named colors …

…compression improved.

Small perfomance improvements. Regexes improved. Quoted unquotable at…

…tribute selectors are unquoted. Blocks with empty rules are removed.

Performance, performance, performance!

Minor fixes