Merge pull request #22 from carstene1ns/master

basic travis support
travis: add sfml building
travis: add gstreamer 1.0
fix sfml building
travis: add gstreamer ppa
travis add udev for sfml
install most deps at once, install sfml as super user
unfold
allow renamed forks
Move code for each drawable effect into seperate class. Fixes #17
Set initial drawable scale to (1, 1)
Fix move effect
add gstreamer video headers
Merge branch 'effect-rewrite'
fix clang build
Merge pull request #23 from carstene1ns/travis-integration

Travis integration
install libstdc++4.8 for clang (this should fix the bug now)
fix compilation with clang (stricter than gcc)
double type does not have a modifier
Merge pull request #24 from carstene1ns/travis-integration

install libstdc++4.8 for clang (this should fix the bug now)
Merge pull request #25 from carstene1ns/double-fix

fix compilation with clang (stricter than gcc)