attempt to fix issue #75: allow iterables by casting to list once
WIP: cython stuff
WIP: fail at fused data types
MAINT: more conversions to give int32 indices instead of int64
MAINT: remove cython code replaced by fused types
MAINT: remove debug prints and more replaced code
MAINT: clean up more leftover debugging junk
remove commments with no or very little information content.
consistently use spaces around operators (pep8). removed trailing white spaces.
code clean up: spaces around operators, removed trailing white spaces, added deliminator rows for increased readability, minor simplifications
Merge pull request #85 from bcriger/master

Fixed permutation in superop_reps.py on new fork
Merge pull request #76 from argriffing/cython-int

do not feed long indices when sparse code expects int32
Merge pull request #82 from jrjohansson/graph_utils-code-cleanup

Graph utils code cleanup
added missing isherm flag to calls to cy_expect_psi_csr
code cleanup
fix return type for d2_psi_photocurrent
bugfix, use axis=2 with np.sum when replacing python sum
use blas norm function
removing commented code, docstring fixes
Merge pull request #81 from jrjohansson/fix-issue-75

attempt to fix issue #75: allow iterables by casting to list once