API change. PdbWrite and XyzWrite have new signatures. Also added MultiPdbWrite
API change: SomeAtoms now returns a Ref
API change: Deleted SomeCoords method of the Traj interface and its current implementations (Molecule and XtcObj)
Merge branch 'xyz' into devel, allows reading multixyz
dcd reading partially working
dcd.go actually added to the tree
progress with DCD reading
Merge branch 'master' into dcd
dcd Next() passes a simple test
DCD Next() and ManyFrames() pass test
DCD test things added to repo
dcd passess all tests
gromacs compilation flag changed for xtc
README update
Merge branch 'devel'
API change: ManyFrames is now a function and not a method of Traj. Also  README update