ReleaseNotes063

Changes

0.6.3 release
minimum requirement is ~~python 2.4~~ python 2.5 (using with_statement in the analysis module and we have not tested on 2.3 in a while)
requires Biopython (www.biopython.org)
analysis modules (MDAnalysis.analysis):
- lipid bilayer leaflet detection
- native contact analysis ("q1-q2")
- rms-fitting based on sequence alignment
write selections for other codes from AtomGroups (VMD, pymol, CHARMM, Gromacs ndx)
gro reader (Issue 31)
better API for loading a topology and a coordinate file in Universe()
trajectory reader: DCDReader can reverse trajectory with negative step increment; XTC/TRRReader can do simple (forward) slices by doing (slow!) sequential iteration
deprecated principleAxes() and introduced principalAxes() with less confusing return values (Issue 33).
fixed wrong unitcell dimensions for XTC/TRR (Issue 34)
added basic XYZ reader with compression support (Issue 35)
PDB reader guesses masses (unknown elements are set to 0)

orbeckst, denniej0, danny.parton, philipwfowler