starting a possible new API. The idea is to minimize the breakage with respect to current devel. At this point, the package is broken
gochem passes the part_test and the plot_test, not the dcd and probably not the xtc
added gonum layer file
dcd and xtc pass the test
Added superposition test, and corrected a bug in the superimposing function introduced with the API migration
Cross is now a method of VecMatrix. An unexported cross function is still provided
MakeTopology and MakeMolecule are now NewTopology and NewMolecule