Version 1.1.1.
Replaces basic escaping of special data with one based on hashes.

* Adds EscapeStore helper class to aid escaping and restoring.
* Necessary for selector- and property-level optimizations.
Fixes #149 - shorthand font property with optional styles.

* It does not offer optimal minification by not handling 'font:normal normal normal <size> <font-family' case.
* Will be further improved to support mentioned case.
Version 1.1.2.
Fixes #150 - minifying background:none shorthand.

* Apparently background:0 does not set y position to 0 but 50%.
Version 1.1.3.
Update History.md.
Update package.json