Configure CMake file so that scenery data can be found.
Merge remote-tracking branch 'origin/master' into wip/stapler-Demo
Prepare CMake file for loading OsgSceneryRepresentation.
Obj data file for Stapler and arm
Add feature to load graphical scenery objects from obj files.
Using config.txt file to search for object files.
Use forearm.osgb instead of arm_collision.obj, which is too big.
Functions to load stapler and arm.
Modify search path in config.txt file to point to example binary folder and
update main.cpp to use config.txt file.
CMake configure file revision, so that executable can find the data file
CppLint warning fix
Fix comment's typo in CMakeLists.txt.
Re-order CMake files, remove non-existing files.
CppLint warning fix
Merge remote-tracking branch 'origin/master' into fix/master-cpplint-warning-fix
Write a general load function for scenery object.

1. Instead of writing individual functions to load stapler, arm, etc.,
use a general function to load scenery object.

2. Re-order headers

3. Add some documentations.
Add keyword 'explicit' to PoseTestRepresentation()
Fix typo in setting name of scenery object and extra space.
Revise based on coding starndard
Move model files into Data/Geometry

To load a model/scenery object, one should use "Geometry/XXX" as path.