Add link to PHPUGHH on Meetup to footer

Adding link to list at the bottom temporarily using the twitter icon
Add link to PHPUGHH on Meetup to footer

Add meetup icon, taken from meetup.com.
Doesn't have the right size.
Add link to PHPUGHH on Meetup to foote

Meetup icon with proper dimensions
Add link to PHPUGHH on Meetup to footer

Adding meetup icon to sprite sheet
Add link to PHPUGHH on Meetup to footer

Adding CSS to display correct icon
Add link to PHPUGHH on Meetup to footer

Ran sprites.png through png crunch, shaved off ~2KB
Merge pull request #40 from kiltec/issue_38

Add link to PHPUGHH on Meetup to footer
Issue #31: Fix deprication warning

Removed 'auto'-option and edited command to start Jekyll in the readme.
Issue #32: fix Rakefile

Changed rake task to launch jekyll preview to use subcommand to start serving using the watch-switch.
Issue #42: Run all PNGs through pngcrush

Ran all images in the assets folder through image optimization tool.
(Used Trimage under Ubuntu)
added basic php favicon.ico
Merge pull request #44 from kiltec/issue-31

Issue #31: Fix deprication warning
Merge pull request #45 from kiltec/issue-32

Issue #32: fix Rakefile
Merge pull request #46 from kiltec/issue-42

Issue #42: Run all PNGs through pngcrush
Merge pull request #47 from icewolfs/master

Issue #43: fav.ico
improved favicon.ico
Fixed the main.less

There were still some differences in css rule positions but the
behaviour is the same now.
Merge pull request #49 from icewolfs/master

improved favicon.ico (Issue: #43)
Merge pull request #50 from benjaminpaap/master

Fixed the main.less
Use of the header property was missing