a test for check_endian
tests to make sure check_endian = off leaves data untouched
add bottleneck installation to travis
skip bottleneck tests if bottleneck not imported
change version of bottleneck to install
fix a ridiculously silly bug in which the computed result wasn't
returned
Merge pull request #66 from keflavich/issue66

check_endian code in _get_filled_data is buggy
split out ytcube into its own file and make a quick movie rendering
try yt imports.  travis has with/without yt for 2.7 tests
add quick isocontour and docs
add example movie
amend?