Move files into dedicated directory, closes #41
Merge branch 'master' into feature/move-files

Conflicts:
	Makefile
	img/img0400.png
	img/pbs-overview.png
	intro-HPC/img/img0400.png
move examples dir
Look at this fancy Makefile ...
weird file
pdf -> all
it now correctly complains
suppress echo messages, explicit echo for the command itself
Merge pull request #43 from hpcugent/feature/move-files

Move everything into intro-HPC.