Add a PortRange utility class supporting CIDR-like notation.
Add strict mode on port range CIDR notation.
Fix PEP8.
PEP8 fix
Update code layout.
Update comments.
Let the PortRange class handle all the gory parsing details.
PEP8 fixes.
Add missing docstrings.
Add missing docstrings.
Update module description.
Add python3 support
Add .gitignore
Add changelog.
Package up our port range utilities.
Fix license URL.
Release 1.0.0
Merge branch 'develop'

* develop:
  Release 1.0.0
  Fix license URL.
  Package up our port range utilities.
  Add changelog.
  Add .gitignore
  Add python3 support
  Update module description.
  Add missing docstrings.
  Add missing docstrings.
  PEP8 fixes.
  Let the PortRange class handle all the gory parsing details.
  Update comments.
  Update code layout.
  PEP8 fix
  Fix PEP8.
  Add strict mode on port range CIDR notation.
  Add a PortRange utility class supporting CIDR-like notation.
Remove duplicate license.