fontello icon configuration

the complete content is located in resources
all required files for rendering are symlinked into according css and font folders in the public folder
removed id suffix from fontello
new icons

for
- lastfm
- blogger
- wordpress
- rss
Merge branch 'guard-support' into social
moved fontello files

into the app folder, which is not very elegant but working now
adjusted fontello.css to use the rails route to the font
added social media icons
adjusted social media style
g+ link is missing
social media button open in new tabs
removed branch condition n Gemfile

this seams to mess up travis, because it is not a mac and thus the Gemfile and the Gefmile.lock do not fitt
Merge branch 'master' into social
Merge branch 'guard-support' into social
Merge branch 'master' into social
Merge pull request #138 from koelncampus/social

social media icons