grayscale: initial, empty theme.

Add symbolic link ln ../modules/pdd/grayscale ./grayscale in
sites/all/themes
grayscale: added css file
greyscale: added basic css styling
grayscale: adding settings to theme
progress.ods updated
grayscale: overriding template files
grayscale: added page--front.tpl.php
grayscale: overriding themable items
grayscale: overriding with template files
grayscale: adding and manipulating template variables
progress.ods updated
grayscale: updated README.txt
Merge branch 'grayscale' into 7.x-1.x