Turn off sort structure for MD runs.
Added function to perform anonymous fitting. The 'best' fit is chosen as the one with the smallest average electronegativity difference between the matched sites (If the fit is within tolerance). A test case has been added.

Changed primitive cell finder to return the niggli cell of the found primitive cell. This should help to prevent returning hyper-skewed cells
Merge branch 'master' of github.com:materialsproject/pymatgen
changed sum to average (not actually important)
Some minor cleanup.
More doc updates.
Added O2, H2, and H2O to compound energies within Pourbaix compatibility. (Pourbaixcompatibility is being moved to a new aqueous compatibility, and the oxide checks are being integrated into compatibility.)
Merge branch 'master' of https://github.com/materialsproject/pymatgen
Fix bug in unit test - didn't reflect changed correction term for superoxide.
revert for time being
Merge branch 'master' of github.com:materialsproject/pymatgen
Merge branch 'master' of https://github.com/materialsproject/pymatgen

,
Minor doc update and bug fix.
Even more improvements to unit handling.
More updates to examples.
Add Pressure units.
Support for power, emg, capacitance, resistance, conductance and magnetic flux
units.
Minor cleanup.
 Preparing refactoring of EventParser
Merge remote-tracking branch 'mpmaster/master'