Add support for Python Wheel

Issue #49
Website: http://pythonwheels.com/
Only show build status for master branch in README.md
Update CHANGELOG with release date for 0.3.0
Bump version number to 0.3.1
Add syntax color to code examples in README
Add support for NETSPEED_EDITION
Add Netspeed feature to CHANGELOG
Release thread lock on exceptions
Add thread lock fix to README
Merge pull request #52 from appliedsec/netspeed

Add support for MaxMind Netspeed
Merge branch 'master' into lock-fix

Conflicts:
	CHANGELOG.md
Merge pull request #53 from appliedsec/lock-fix

Release thread lock on exceptions
Add alias methods for ISP and ASN lookup
Create table of supported databases
Use smaller test databases and optimize tests
Add __version__ to __init__.py
Using __version__ in setup.py
Merge pull request #55 from thuandt/master

Add __version__ to __init__.py
Drop oen more Epydoc reference
tox dropped support for Python 2.5