funzo dunzo 3
Addressed Issues #6 and #8.
Added _grow_matrix() that operates as expected.
Collapsed large sections of _traversal() to increase modularity.

Note that the current implementation tests tolerance on the final
isotope AFTER destruction is applied.
Added test for matrix grower method (#10).

Fixed test_expm to use correct numpy array equivalency test.
Unfortunately, this also removed the high level Taylor series convergence
test. Since the taylor method is not currently in use, this is an acceptable
loss.
Merge branch 'staging' of https://github.com/pyne/pyne into staging
Merge branch 'transmute' into staging
allow making materials from materials
Minor formatting changes in mcnp.py.
turned data load-in warnings on again.
Merge remote-tracking branch 'upstream/staging' into staging
change tab1 tests to reflect new fake data
commit before rerunning stlwrap
have wrapped vectors as numpy arrays
Reads in U235 xs data.
Cleaned up a bit.
changed 'zzaaam' var name to 'nuc'
Added MapStrVectorDouble
Merge remote-tracking branch 'upstream/staging' into staging
fixes in reading headers
legend of the seeker
clean up unresolved some more