Simple tools I will need for the abinitio sub-package
Preliminary integration of the abinitio modules with the pymatgen package.
 Add  *.swp files to gitignore
 Unitary tests for pseudos.py
Add pseudopotential files for unitary tests.
 PeriodicTable now supports __getitem__[Z] and the iteration protocol
 Unitary tests for Lattice.scale and EOS fit
 Unitary tests for netcdf reader
 Basic unitary tests for workflow
Add jobfile.py
Added new methods to SiteCollection to iterate over sites of the same kind.
New class PymatgenTest(unittest.Test) that supports the comparison of ndarrays.
New module filelock.py implementing file locking mechanism
 Improving the documentation of new modules
Merge remote-tracking branch 'mpmaster/master'

Conflicts:
	pymatgen/core/lattice.py
	pymatgen/core/tests/test_lattice.py
 Had to reinstate the use of the external module periodictable since pymatgen.peridic_table is not complete
Merge remote-tracking branch 'mpmaster/master'
 Fixed minor problem in unitary test.
 Added module task.py providing the base class AbinitTask
 New sub-class IterativeWork for iterative calculations (e.g. convergence studies)