modify gitignore file
add WireframeTetrahedron class
create the constructor
create the width & height getter/setter
override the buildGeometry
correct the index error
create WireframeTetrahedron constructor
create the width & height getter/setter
override the buildGeometry
correct the index error
Merge remote-tracking branch 'origin/dev-WireframeTetrahedron' into dev-WireframeTetrahedron
Merge remote-tracking branch 'tcper/dev-WireframeTetrahedron' into dev

Conflicts:
	.gitignore