MIANT: rename Buffer.len to Buffer.size, equal to ndarray attribute.
MAINT: remove memory_buffer_object function.
ENH: replace Buffer object with normal access to numpy arrays.
MAINT: remove arraytools.pxi, move couple of left over utilities to _pywt.pyx
MAINT: remove array_interface files.
PY3K: fix bytes/str issues in _pywt.pyx.
MAINT: allow array_like input to dwt, idwt and swt.
BUG: fix `mode` input to dwt, idwt and swt functions.
BUG: accept array_like input in `upcoef`.
WIP: cA/cD can be None, should be handled.
BUG: ndarray.size attribute not writeable; this code seems to have no function
BLD: include missing numpy header for building _pywt extension.
TST: convert modes.rst regression doctests to unit tests.
TST: convert multilevel doctests to nose format.
MAINT: bundle scipy.lib.six as tools.six
Merge branch 'doctest-to-nose' into master.

https://github.com/rgommers/pywt/pull/26

Conflicts:
	src/_pywt.pyx