Update the information in setup.py
Add some package information for bdist_rpm command.
Need to explicitly add the numpy header location in setup.py.

Otherwise, building fails for some distributions.
Prep for v1.0.0~alpha2.
Added tag 1.0.0-alpha2 for changeset 5684cb29f301
Add more package dependencies to bdist_rpm section of setup.cfg.

Handle distribution-specific package names.

Now builds on CentOS6, Fedora 17/18/19, and OpenSUSE 13.1, using the openSUSE
Build Service - https://build.opensuse.org/package/show/home:neishm/python-pygeode
Some minor tweaks to the setup.

- Change the package name from "pygeode" to "python-pygeode", since that's
  the common naming convention for python packages in Linux distributions.

- Tweak the "requires" field for RPM-based installs.  Can now install and run
  on at least a couple of RPM-based distributions (Fedora 18 and openSUSE 12.2
  have been briefly tested).

- Change license string from "GPLv3" to "GPL-3", to satisfy a lintian warning
  in the openSUSE build.

- Change author email from pygeode-dev to pygeode-users, since the former is
  a closed mailing list (don't think anybody outside can actually see those
  discussions).