Merge pull request #9 from mlund/master

merge
Nothing minor
Merge branch 'master' of https://github.com/bjornstenqvist/faunus

Conflicts:
	src/examples/stockmayer.run
Minor
Update
NN
Simplifications
Nothing major only minor
Reconstruction and volume update
Diel-constant update
Diel-const again
NNN
Added MPI routines for energy calculation; Modified mixed potentials;
Fixed S of q calculations; Updated doc; Added Nbody translation-rotation
move for groups; manybody example is now MPI only.
Fixed dependency with MPI and manybody example
Added manybody test (inactive); Fixed titration scan for wrong charges
MPI info() function
Added mass center constrain
Merge branch 'master' of https://github.com/mlund/faunus
Debye formula with periodic boundary correction (BETA); minor update to
manybody run script
Faster group-2-group cutoff interactions that also works for
i2all energy function