BF: h5save to deal with '' as currentdir
Merge branch 'master' of github.com:swaroopgj/PyMVPA

Conflicts:
	mvpa2/base/hdf5.py
Added a test case to test_hdf5 that fails to load an empty array object
BF: h5load(ing) an empty array from h5save(d) file results in ZeroDivisionError.
BF: Modified the test to handle zero-sized arrays
Merge branch 'master' of https://github.com/swaroopgj/PyMVPA
NF: I/O test for empty surface voxel selection results