Calpack

We've stomped out a few bugs, and added a few features as well:

* Added the ability to define the endianess of the packet.
* str and repr now produce valuable information about the packets and it's fields

We've also done some cleanup of the code as well.

This fixes a lot of issues and adds new features so here we go:

* Fixed access issues with the internal c_structure of the Packet class
* Fixed issues with the `ArrayField` not properly configuring the internal c_structure
* Cleaned up unittest tests
* added the following fields: `IntField8`, `IntField16`, `IntField32`, `IntField64`, `FloatField`, `DoubleField`, `LongDoubleField`, `BoolField`, `FlagField`
* Updated documentation! [Check it out](http://concorde.readthedocs.io/en/v0.1.2/)

Thanks for using CalPack! This release was dedicated to a few fixes and added integrations:

* Updated codebase with pep8 and pylint suggested changes
* Added testing integration into appveyor
* Improved documentation! [Check it out](http://concorde.readthedocs.io/en/v0.1.0/)
* a few other minor issues resolved

This release is the first official release of CalPack. It enables all the basic features that I was hoping to accomplish including:

* Ability to create packets using a easy to ready class definition
* Ability to export/import to and from bytes string
* Ability to create custom Fields
* Builtin IntField to handle the basic field
* Builtin fields ArrayField and PacketField to create arrays and encapsulated packets