Reworked ENDF tests to use id form for nuc_i

Additionally, made endf.test_u235 fail with a useful error message
when the data file is missing.
merge conflict fixed
tiny formatting fix
cleaned up tests
fixing import style
Added cython version printing
Merge pull request #191 from scopatz/cyver

Added cython version printing
Add environment PATH to hints to find Cython.
Merge remote-tracking branch 'upstream/staging' into staging
Made test_endf.test_u235() download missing data if necessary
Add H5close() statements to clean up pointers.
Add check for existing h5 file to test_matlib_hdf5
added u235 to ignore
Fixed ENDF bug where it would not read the data in, now it reads the data in
Merge remote-tracking branch 'upstream/staging' into staging
Merge branch 'find_cython_19' into staging
Merge branch 'staging' of github.com:crbates/pyne into crbates-staging
Use file access property settings to close all remaining objects

Instead of calling H5close which could break other open hdf5 files just
close the indentifiers for the file that is currently being accessed
using access property list settings.
Merge branch 'staging' of github.com:crbates/pyne into crbates-staging
added endf to doc /facepalm