small improvements
move macros to toplevel
Merge branch 'master' into improve-styleguide

Conflicts:
	intro-HPC/macros.tex
make makefile depend on macros
this is a step in the right direction
add available macros to style-guide
small cleanup
add header
add note about macro values being UGent ones
only UGent
Merge pull request #58 from hpcugent/improve-styleguide

Move macros.tex to site-specific directory.