Added grand canonical features to part command
removed printf from core function
changed return values and fixed some bugs
Debugging and cleaning up
Merge branch 'master' of git://github.com/espressomd/espresso into grandca
vtf charges-workaround, prepare_vmd connection moved to vtf

Conflicts:
	scripts/auxiliary.tcl
Updated NEWS.
Fixed logo svg files that were broken after some previous merge.
Merge branch 'grandca' of https://github.com/richter-t/espresso into grandca
Added GRANDCANONICAL to feature list, (c)-header and latex cleanup.
Updated copyright headers and added GPL header to files where it was missing.
Merge branch '3.1'

Conflicts:
	doc/ug/io.tex
	samples/check_potential.tcl
	samples/diamond.tcl
	samples/lj_benchmark.tcl
	samples/maggs.tcl
	scripts/auxiliary.tcl
	tools/series.tcl
	tools/watch.tcl
Added forgotten copyright header and license.
Repaired header inclusion.
Merge branch 'master' of github.com:espressomd/espresso
Merge branch 'master' into cpp