Initial launcher with drag and drop support.
Added clean-image-path function used to load image in Launcher.
Some more gui stuff.
Some small text adjustments
Launcher now works.
Merge branch 'launcher' of github.com:raffomania/drawler into launcher

Conflicts:
	src/launcher.rkt
Fixed merge.
Minor changes to launcher.
Merge branch 'launcher'

Conflicts:
	doc/feinentwurf.pdf
	src/client.rkt