CSSTidy Code

Fixed parsing of font-family with several words (adding quotes if required)

Added line-height:normal (why??? no trace in specification) if no line-height on font shorthand specified.

Fixed PHP notice on undefined index

Fixed minor bug in resolving font-property (numeric / negative / with dot).
A bit improved background-position (now also handles dots in numbers).

Separated shorthands optimization - font now enabled with value 2, font + background - with value 3. Value 1 is completely safe.

Added font property resolving (works by default on optimize_shorthands=1).
Tuned unit tests with settings.
Added unit test about multiple font-family.

Fixed bug with resolving second negative background-position value.

Applying patch from ticket #2597191
https://sourceforge.net/tracker/?func=detail&aid=2597191&group_id=148404&atid=771415
Thx to blueyed

One more test and bugfix

Unit test cleanup and more unit tests + bug fix for number optimisation