2.6.3 release.
Cleanup code. 2.6.3 release.
Rename rms_dist to get_rms_dist.
Fix bandgap.
get_rms_dist will return None if no matching lattice is found
Fix PROCAR. Fixes #13.
Fix selective dynamics. Fixes #14.
Fix selective dynamics.
Increment to 2.6.4b.
Cleanup tests.
Add one more tests.
Merge remote-tracking branch 'mpmaster/master'