Merge branch 'master' into BayesBias

.travis.yml

CHANGES/Unreleased.txt

patches/patch.sh

regtest/multicolvar/rt-waterbridge3/Makefile

regtest/multicolvar/rt-waterbridge3/colvar.reference

regtest/multicolvar/rt-waterbridge3/config

regtest/multicolvar/rt-waterbridge3/plumed.dat

regtest/multicolvar/rt-waterbridge3/trajectory.xyz

src/analysis/Analysis.cpp

src/bias/MetaD.cpp

src/bias/PBMetaD.cpp

src/core/ActionWithArguments.cpp

src/core/SetupMolInfo.cpp

src/function/FuncPathMSD.cpp

src/generic/DumpAtoms.cpp

src/multicolvar/MultiColvarBase.cpp

src/tools/Grid.cpp

src/tools/KernelFunctions.cpp

src/tools/LinkCells.cpp

src/tools/RMSD.cpp