TST: Add missing tests for utility functions
Merge branch 'issue-290' of github.com:wasade/biom-format into issue-290
TST/MAINT: Add failing tests
fixing test_dtype
Merge pull request #2 from teravest/daniels290

fixing test_dtype
fixing test_shape
Merge pull request #3 from teravest/daniels290

fixing test_shape
TST: Fix tests for _to_dense
Merge branch 'issue-290' of github.com:wasade/biom-format into issue-290
TST: Fix get_row tests

The test was failing because the initializing values were not sparse
objects.
TST: Fix tests for equality operator method
BUG: Add check for same type
TST: Fix tests for test_ne
BUG/TST: Add check for type of table
BUG: Type was not being defaulted to None

If the value was an empty string the value was not being defaulted to
None, hence causing some problems.
TST: Fix tests for test_getitem
TST: Fix test_nnz tests
TST: Fix tests for test_get_col
STY: Fix PEP-8 complaints
ENH: Remove dead code