Apply /* @embed */ pragma to all images, not just the topmost in each block

MediaWiki ResourceLoader's CSSMin scopes each /* @embed */ to the rule
immediately below it, not the entire block. This patch adds the pragma for the
image assets which were omitted.
Merge pull request #317 from atdt/master

Apply /* @embed */ pragma to all images, not just the topmost in each block
Drop -moz-linear-gradient

The cost is bigger than the benefit now
Merge pull request #318 from Nikerabbit/linear-gradient

Drop -moz-linear-gradient
Update README.md

Starting a simple server with php
Merge remote-tracking branch 'upstream/master'