Moved OpenSteerDemo.cpp to proj FSAMS

Moved OpenSteerDemo.cpp to project FSAMS because I believe we will need
to edit OpenSteerDemo.cpp to add new keyboard shortcuts and whatnot.
Added Filter: "Environment" / Deleted Unused Files

The environment filter/file will contain all information pertaining to
the Environment.  Specifically an Environment will contain classes,
data-structures, and methods that codify the floor layout (walls, doors,
elevators, exits, stairs... etc) and the locations and types of sensors,
alarms, runway exit lights, etc...  Essentially it contains the "map" of
the building as well as the tools to load and save the "map".
new class FSAMS::Environment::Vec2
new class FSAMS::Environment::Boundary
Environment -> FSAMS::Environmtnet::Environment

Removed structs that are not fully implemented. Adjusted class
Environment to use class Boundary for walls.  Moved class environment
into the FSAMS::Environment namespace.
Adjusted FSAMS.cpp to use namespaces and renamed to FSAMSPlugin.cpp
Move drawing environment into class Environment
const correctness and constructors
Fixed Typo
const correctness
fixed typo
camera now looks at vehicle camera_target

OpenSteer::camera is now focused on camera_target and is looking
straight down at camera_target.  Moving the camera_target will move the
camera.