Add initial set of resource classes with GET functionality
Remove reference to resources.Mapping
Add create and delete methods
Add basic update methods
Add example of basic CRUD usage
Reorganise to use an api class rather than a global connection
Update readme
Update API host url
Add tests for bigcommerce.api
Make package python3 compatible

* Remove relative imports
* Remove reference to urllib.urlencode
* Add python 3.3 to travis
Update setup.py (bump version to 0.10.1)
Remove resource_meta, used for discovering valid api endpoints

This was incompatible with OAuth, and has been replaced by the
class heirarchy
Fix basic authentication parameters being used inconsistently
Add tests for bigcommerce.connection

Fixes issue with verify_payload on python 3
Add tests for resources/base.py

Increases test coverage to 82%
Bump version to 0.10.2
Removing fixtures folder, which is no longer used at all
Merge pull request #6 from tgsergeant/feature/resource_classes

Add high level class layer to API