Defining version for pip 1.4+

PIP 1.4+ treats version numbers which aren’t compliant with PEP426 as pre-releases, and won’t use them… `phonenumbers` uses such version numbers.

Setting a similarly non-compliant version gets around this (feel free to propose an alternative version to compare with).
Fix typo in phone number region settings name.

With backward compatibility.
Drop unused string functions

They're a bit obscure anyway. This is a port of
https://github.com/tangentlabs/django-oscar/commit/8573052b89988ecd7d68f5e0207d37934be91847
Add AUTHORS file
Merge pull request #25 from Kobold/patch-1

Fix typo in phone number region settings name.
Merge branch 'refs/heads/feature/maikhoepfel-enhancements' into develop

Conflicts:
	phonenumber_field/phonenumber.py
adds initial travis config
sets .travis_setup executable
installs package in develop mode
adds python 2.6 and django 1.5 to the build matrix
Merge branch 'feature/travis' into develop
fixes #11
ignores .tox
Merge pull request #20 from stucox/patch-1

Defining version for pip 1.4+
bumps version to 0.5
Merge branch 'release/0.5'
Merge remote-tracking branch 'stef/master' into develop

Conflicts:
	phonenumber_field/phonenumber.py
	phonenumber_field/tests.py