CSSTidy Code

- Add discard_invalid_selectors cfg and functionality; this fixes some of the duplicate combinator problems
- Minor comment formatting changes
- SETTINGS and FULLEXPECT support added to csst tests

Minor formatting changes:
- Compress extended if/else statement to indicate chaining
- Remove trailing ?>, it's not necessary in PHP!
- Add a custom harness for all unit tests

Finish the rest of the "normal" selectors.

Finish the "correct" selector cases; use inherit which is safer

Add all basic selectors, set svn:eol-style=native for rest

Make unit tests use SimpleTest, integrate in the framework. We have a custom reporter.

Reorganize unit tests directory. We will put all unit test classes inside unit-tests.php

- Added Changelog, and documented all of the changes made by brettz9 and _sined since the last 1.3 release
- Marked COPYING, NEWS and README svn:eol-style=native

Add unit testing to CSS Tidy and tests for selectors, needs Text_Diff to work

Add a continue to bad hexadecimal code correction, otherwise value is clipped to zero.