Changed mdconvert test w.r.t. chunking and found a serios bug in save_binpos when multiple writes occured on the same file. fixed bug and added a tests to the test_binpos suite to catch it
update mdconvert to use new topology subsetting
add fixes for n_frames/stride simultanious bug
add tests to check for bug that previous commit fixed
the c code too
oops. forgot to add the binpos test too
make testing.eq() return true so that it can be chained in a single statement
add scripttest to the delay_import code, so that we can run the test_mdconvert on machines without it installed
fix bug in hdf5.py where the frame_index was beng advanced too far
moved test directory from test/ to tests/, which is how it is in numpy. this lets us have a function in __init__ called test()'