Fixed invalid connection arg in tests
Introduced ObjectHandler

A Model’s namespace has been uncluttered by moving all table-related
methods (classonlymethods on the Model) to an attached ObjectHandler.

Each Model has a single instance of an ObjectHandler which exposes
table-related operations on the Model, such as create(), get(),
filter() and more.

Even more, has_many and has_and_belongs_to_many relations have their
own object handler that inherits from the base ObjectHandler:
RelatedObjectHandler and RelatedM2MObjectHandler. This means that all
operations exposed by ObjectHandler will be available in one-to-many
and many-to-many relations too!
user[‘credit_cards’].create(type=‘Visa’) and
post[‘tags’].get(name=‘recent’) are valid!

Custom defined table-related operations can be added to a model by
subclassing ObjectHandler and setting Model.object_handler to the new
class.

This solves #5 and partially #1.
Updated development section of docs
Updates docs with ObjectHandler changes
Swapped inflect module for inflection

Inflection has a cleaner API and solves some small quirks inflect had.

Also, table names are correctly generated now for models that are
CamelCased.
Use Tox for running tests
Added count() method in ObjectHandler (closes #1)
Updated docs after adding count() on ObjectHandler
Corrected error handling in utils (fixes #6)
Merge branch 'develop'
Remodel v0.2.0