Theme and descryption by dralgebra

This is the port of the famous Crystal kwin decoration theme to KDE 4.x.

For 3.x version see:
http://www.kde-look.org/content/show.php/Crystal?content=13969

There are some regressions from the 3.x version, so 1.0.5 still has more features than 2.0.0:
- No support for any kind of transparency, neither fake nor real
- Tooltips seem to be broken for any window decoration

Main features:
* Choose the blending color of the buttons.
* You can define the title bar height and border size of the windows.
* Right click on minimize button toggles shade mode.
* Middle click on minimize button sends window to below.
* Double click on program symbol closes window.
* Support for button themes. Basic button theme is included, feel free to swamp me with cool themes.
* Can show a tooltip of the caption
* If kdocker is installed (http://kdocker.sf.net), right click on close button will send the window to the systemtray.

-- INSTALL ---------------------
Basic Installation (from the console):
- Step 1 (as user)
$ cd build
$ cmake ..
$ make
- Step 3 (as root)
# make install

If you installed crystal while it was running, you need to restart kwin to use the updated version: kwin --replace