Merge pull request #27 from z2v/py3

Python 3.3 compatibility
Include 'numpy.i' in installed files
Doc changes
Exclude a couple of tests from test suite

These tests rely on order of keys in 'auxfns' dictionary. They fail
_sometimes_ on Python 2. And *always* fail on Python 3 due to
intentional randomness in the order of keys.
Setup 'tox', adjust 'pytest' settings

[ci skip]
Convert README in reStructuredText format

While here, fix 'python setup.py sdist' warnings

[ci skip]
Merge pull request #28 from z2v/readme

Convert README in reStructuredText format
Fix 'inequality' operator name
Avoid cleaning 'tox' directory
Fix DeprecationWarning

Overriding __eq__ blocks inheritance of __hash__ in 3.x
Delete files generated for tests by Python 3.4
Sort dependencies

To guarantee dependencies order (mostly for tests)
Fix line endings

[ci skip]
Adjust assertion for FreeBSD
Fix Clang warnings
Add targets for Radau/Dopri compilation
Adjust 'Integrate' type
Run simple integration on 64-bit Python 3