updated pmpc; ports with 1 out of plane point
removed alias from ethane.xml
Merge remote-tracking branch 'origin/master'
updated xmlreader
mktop files with opls parameters
Merge branch 'master' of https://github.com/sallai/mbuild
hacked parser for gromacs FF info
Merge branch 'develop'

Conflicts:
	examples/ethane/alkane_tail.py
	mbuild/compound.py
	wip/mpc_monolayer/mpc_monomer.py
	wip/mpc_monolayer/pmpc.py
fixed relative paths in module
moved mktop to wip, removed duplicate files
moved mktop to wip
moved mktop to wip
Merge branch 'develop' of https://github.com/sallai/mbuild into develop