add vasp.out to backup files for various handlers
Only trigger MaxForce when vasp isconverged. Tighten default force
convergence criterion
Add copy_magmom option in VaspJob
Copies the final magmom from the OUTCAR to the next INCAR
added try-catch for copy_magmom
Added a rampU job type to run_vasp

Allows slow ramping of U values over a series of relaxations.
Increment monty requirements to use more robust ScratchDir handling.
fix scf reset logic
Merge remote-tracking branch 'origin/master'
Changed POTIM error handler to change relaxation to damped-MD if potim is too low, as per Kresse recommendation. Also added test cases for POTIM error handler
Test files for POTIM error handler
Added aliasing_incar error to VaspErrorHandler

Catches when VASP detects an error in user-supplied FFT grid (such as
after an FFT correction is applied). Removes NGX, NGY, NGZ from INCAR
Merge branch 'master' of github.com:materialsproject/custodian
update NonConvergin'ErrorHandler with VASP recommendations
Merge branch 'master' of github.com:materialsproject/custodian

Conflicts:
	custodian/vasp/handlers.py
Update NonConvergin'ErrorHandler for Vasps recommendation
allow maximum_errors to be specified as a command line arg
Use MontyDecoder.
Update req for monty.
First round of Py3k updates for custodian.
Add six to requirements.