missing header for std::max, didn't compile under VS 13.
handles std::min error
Remove unnecessary tests before delete.
Remove obsolete GPU-related code.
Replace calls to the accessor function GetStep() with the member variable 'step'.

While the compiler will most likely take care of this (i.e. this is not an efficiency issue), the various calls to GetStep() made it inconvenient to step through while debugging.
Fixes to `Vequal()` and `Qequal()`

- Fix bug in `Vequal()` which was comparing addresses instead of vectors.
- Change `Qequal()` to return a bool and implement it in terms of the quaternion equality operator.
- Change arguments to const references.
Cleanup of static functions for operations on vectors and quaternions.

Use const references for arguments to prevent unnecessary copies.
Cleanup the `Qnotnull()` function.

- Change return value to bool
- Use const reference for argument

**Note**: it is questionable how appropriate this function is to begin with, as it involves floating point comparisons...
Use cont reference for argument of `SetRot()`
Use const references for arguments of `ChLinkMarkers::Initialize()`
Use const member functions in ChObject
Eliminate `ChLinkMarkers::SetMarkers()`

Simply replace it with calls to SetMarker1() and SetMarker2()
More conversions to const references.
Connected triangle mesh saves the filename of the mesh loaded. This can be useful for visualization (using OpenGL or Ogre etc) as the mesh can be loaded once at initialization and redrawn as long as the filename is the same.
Cleaning up cone and cylinder to get rig of local position/rotation information
That should be stored at the visualization level.
Also modified the ChPovRay post processing function and the demo post process file.
Fixes gcc warnings for c++11
Added rounded shapes to collision model
Fixed ChCRoundedBox header guard
Revert "Cleaning up cone and cylinder to get rig of local position/rotation information"

This reverts commit 8006844276158025e6b66a9973eb3e7a7d7d6f78.
Const fixes for gcc on osx
Cleanup of old code.