Fixed problems with filtering ROOT files when reading

This PR fixes a problem with filtering on-the-fly when reading ROOT files using root_numpy.

root_numpy has support for on-the-fly selections, but obviously can't handle gwpy-style function filters, so we need to separate out the simple filters from the function filters and perform each appropriately.

I updated the unit tests to capture this in test_read_write_root.

Created by: pep8speaks

Hello @duncanmmacleod! Thanks for submitting the PR.

• In the file gwpy/tests/test_table.py, following are the PEP8 issues :

Line 339:5: E303 too many blank lines (2)

assigned to @duncanmmacleod

added gwpy.table + 1 deleted label

Merged by: duncanmmacleod at 2017-12-06 07:25:04 UTC

merged manually

closed

changed milestone to %0.7