Try a minimal AppVeyor setup, and see what happens.

Tests now work fine with setup.py, so use that for travis.

This currently doesn't use coverage or doctests, so those are TODO.

The install step is split into two stages, the first creates wheels for all
requirements, and the second installs from those wheels. The wheels and
downloaded sources are cached with AppVeyor to reduce build times.

Debian stretch has a (very) old pip, and what worked on my machine is no
longer valid. Use new caching mechanims instead.

Cache pip install on travis-ci as well.

According to the article linked in the header, python3.3 and 3.4 need a
special flag to make sure the build environment is set up correctly.

This works together with util/appveyor/build.cmd.

This makes the build process a little more consistent (same packages updated
and installed on both platforms). Also removes the dependency of the appveyor
cache on appveyor.yml, which was preventing me from properly testing it.

Caching on Travis doesn't seem to be working, but we'll see if this helps.

Numpy build was failing, this might be the reason.

This commit enables doctests and coverage reports. Also fixes the absurdly
long logs (nosetests is more compact than test).

Note matplotlib is required for data/_readers.py, use a non-interactive
backend for travis.

Update tox.ini to install matplotlib for new doctests, and don't change out
of source directory.

Coverage isn't quite right, it includes lots of other modules not part of
pywt (dateutil, etc)

No longer used.

Apparently setup.py nosetests already specifies --where, so using that
gives a warning that it'll be deprecated in future. Use ignore-files
instead.

Install coverage on appveyor.

Shape returns e.g. (512L, 512L) on python2 appveyor. Check for equality
instead.

Other packages (notably matplotlib) link against numpy, so they must be
installed in the correct order.

Don't specify a numpy version so pip doesn't insist on upgrading it with
pywt.

Cython is treated as a compiler and not required after distribution, so
don't require it.

This allows the import of Cython to fail, and attempts to use pre-built C
sources if it does.

Tests before didn't pick up problems with the distribution (e.g. missing
data files) that were present in the source tree. This should be fixed in
CI now, developers should probably use:

./setup.py build
nosetests build/lib.xyz/ --tests pywt/tests

nosetests wasn't added to $PATH on windows, so specify full location.

Old link was broken/the wrong link in the first place.