Added Vectors.lua to libs_sh/
Removed ref DefaultEnvironment.Vectors from builtins.
Ref #157
Changed Vector to our Vector type in libraries.
General codestyle cleanup in affected areas.
Ref #157
Added Angles Type, libs/sh.

Ref #157
Changed existing Angle usage to our Type.

Ref #157
Rem builtins comments causing doc issues.
Merge pull request #197 from awilliamson/iss157v2

SF Vector and Angle Types + Lib support.