Bugfix and enhancements for issue 1

- Fixed a bug when using optimize_network_range on wildcard patterns
  (fixes jathanism#1)
- Convert CHANGELOG to rst format
- New unit test for optimize_network_range
- Added README.rst to MANIFEST.in so it gets bundled in tarballs

Release 0.6.2

- Version is currently stored in setup.py and cidrize.py now, because if
  netaddr wasn't installed, cidrize install actually fails. How novel!

Release 0.6.1

- Added LICENSE.rst (BSD 3-clause)
- Updated requirements to netaddr>=0.7.6
- Removed download_url from setup.py
- Other housekeeping within setup.py

Release 0.6

- IPv6 addresses are now supported!
- Enhanced dump output to display IP version
- Cleaned up formatting in README.rst
- All debug printing replaced with logging module (hint: set environment
  variable DEBUG=1)
- Bugfix to bracket-style in which patterns with brackets not in 4th
  octet were sometimes matching.
- Bugfix when returning strict results on parse styles that return
  IPRange objects (bracket, hyphen styles). If an IPRange is larger than
  the hard-coded limit of a /18, then it will always be strict.
- All changes covered by tests.

Optimization to range style parsing to improve speed on parsing large…

… ranges

  (such as /8).

Add ValueError to exceptions caught in cidrize() for wrapping with Ci…

…drizeError

Marked off stuff that is done!

Bugfix for hostnames passed to cidrize()

Bugfix for hostnames passed to cidrize()

added example for 0.4 changes