CSS Parser Code

Only simple selectors are valid as parameter for the :not pseudo class (CSS3).
Whitespace before the includes operator was not handled correctly (e.g.[rel ~=val]) (CSS3).

clarify one log entry

one more test

code style fixes

Fix the toString method for functions to insert a blank at the right places (CSS3);
some more code style warnings fixed

simplify parser

first howto added

start working on the next release

0.9.12