Restructured dir tree into bin, lib, etc

From a high level, broke out the class libraries from the scripts which use them

There are three libraries which reside in the lib/ directory:

scancam - Classes for scancams and the scans that they use
bst_camera - Camera class that handles video capture and compression
zaber - Externally developed library for using zaber devices. Updated with
additionally required functionality

Several scripts for building and testing scans live in bin/

A configuration file for the scancam device hardware configuration is in etc/
Split scancam.py into lib classes and excecutable
Changed scripts to be command-line excecutable
Moved scancam.py so it is not submodule of itself
Moved scancam back in its own directory

Each of the three directories under lib are their own modules instead of
the improperly implemented idea of bst_camera and zaber being sub-modules of
scancam.
add setup.py and __init__.py files for distutil