Started adding all the stuff for reweighting in an averaging base class

regtest/analysis/rt-histo/analysis.0.fesA1.reference

regtest/analysis/rt-histo/fesA1.reference

regtest/analysis/rt-histo/fesA1u.reference

regtest/analysis/rt-histo/fesA2.reference

regtest/analysis/rt-histo/fesA2u.reference

regtest/analysis/rt-histo/fesA3.reference

regtest/analysis/rt0/histoA.reference

regtest/analysis/rt0/histoB.reference

regtest/analysis/rt0/histoD.reference

regtest/analysis/rt0/histoD1.reference

regtest/analysis/rt0/histoE.reference

regtest/analysis/rt0/plumed.dat

...llization/rt-wcsurface2/analysis.0.contour2.dat.reference

regtest/crystallization/rt-wcsurface2/contour2.dat.reference

...t/multicolvar/rt-dens-average/analysis.0.dens1b.reference

regtest/multicolvar/rt-dens-average/dens1.reference

regtest/multicolvar/rt-dens-average/dens1b.reference

regtest/multicolvar/rt-dens-average/dens1ba.reference

regtest/multicolvar/rt-dens-average/dens2.reference

regtest/multicolvar/rt-dens-average/dens5.reference