Merge pull request #207 from timattox/USER-DPD_new_VV_for_DPD

doc/src/Eqs/pair_dpd_conservative.jpg

doc/src/Eqs/pair_dpd_conservative.tex

doc/src/Eqs/pair_dpd_energy.jpg

doc/src/Eqs/pair_dpd_energy.tex

doc/src/Eqs/pair_dpd_energy_terms.jpg

doc/src/Eqs/pair_dpd_energy_terms.tex

doc/src/fix_dpd_energy.txt

doc/src/pair_dpd_fdt.txt

examples/USER/dpd/README

examples/USER/dpd/dpd-shardlow/in.dpd-shardlow

examples/USER/dpd/dpd-shardlow/log.dpd-shardlow.reference

examples/USER/dpd/dpd-vv/data.dpd

examples/USER/dpd/dpd-vv/in.dpd-vv

examples/USER/dpd/dpd-vv/log.dpd-vv.reference

examples/USER/dpd/dpde-shardlow/in.dpde-shardlow

examples/USER/dpd/dpde-shardlow/log.dpde-shardlow.reference

examples/USER/dpd/dpde-vv/data.dpd

examples/USER/dpd/dpde-vv/in.dpde-vv

examples/USER/dpd/dpde-vv/log.dpde-vv.reference

examples/USER/dpd/dpdh-shardlow/in.dpdh-shardlow