Add storage facility

[djihbril]

Resolves #67 Resolves #68 Resolves #69 Resolves #82 Resolves #83 Resolves #84

• Added the ability to save an action path, along with various other storage features.
• Established a configuration infrastructure that we can build on.
• Added device.ini device configuration file.
• Added a sample action script.
• Refactored edsdk_object.py to reduce linting. @inchkev please ensure that the EDSDK event handler callbacks still work - Thanks.
• Delinted and fixed various bugs