Fixed bug with array unit conversion with big-endian arrays
Explicitly include configobj_py2,3 and pyparsing_py2,3 in MANIFEST.in, otherwise only the files for one of the Python versions is included in a source distribution.
Merge pull request #742 from astrofrog/setup/fix-missing-files-sdist

configobj_py3 not included in v0.2b2
16-bit floats don't work with Numpy 1.4 and 1.5 - no need to test.
Add workaround for Numpy 1.4.1 bug: unicode dtypes cannot be used (and we are importing unicode_literals from __future__, which is why we have this issue).
Merge pull request #744 from astrofrog/unit/fix-quantity-big-endian-bug

Issues with big endian Numpy arrays in Quantity
added new timer module
added timer codes and docs, still need to add tests
added timer tests and doc
fixed timer tests
fixed doc and test errors, tested on Python 2 and 3