Beginning of a concentration dependent screening length in Debye-Huckel
pot.
Added Chung+Denton potential and pressure calc.
Documentation
Merge branch 'master' of https://github.com/mlund/faunus
Added grand canonical example; fixed widom analysis; documentation;
fixed nan problem with DebyeHuckelShift w. inspecified cutoff.
Merge pull request #25 from jmhenriques/master

My changes to the code.
web now doxygen only; grand canonical python test; shorter unit tests
Work on polarization and external, uniform electric field
More polarization; update wolf/yonezawa information in bulk example
Merge pull request #3 from mlund/master

update