Corrected faulty mesh density calculation in P3M tuning.
small correction in p3m tuning.
Merge branch 'master' of https://github.com/espressomd/espresso
removed checkpoints from diamond.tcl and analysis.tcl
Merge branch 'master' of https://github.com/espressomd/espresso

Conflicts:
	src/p3m.c
added tabs to analysis
Merge branch 'master' of https://github.com/espressomd/espresso
minor changes
Removed Checkpoints
analysis.tcl rewritten
Merge remote-tracking branch 'tsteinle/checkpoints'
Merge branch 'master' into checkpoints

Conflicts:
	samples/diamond.tcl
added reinit of lb bound on boxl change for cpu code
Moved main reaction part out of the integration loop and into 'reaction.c'.
Small fixes (sample forcecaps, perms, string lens)
Merge branch 'reaction' of https://github.com/rempferg/espresso
Deleted stray printf.
User documentation for fcs autocorrelation function - recovered from a mistaken merge
Merge branch 'reaction' of https://github.com/rempferg/espresso
Added transparent background to logo pixmaps.