[SharpDX] Add MathUtil.SmoothStep and SmootherStep
[SharpDX] Use MathUtil.SmoothStep for all SmoothStep methods
Merge branch 'master_integration' of https://github.com/shoelzer/SharpDX into pr149
[General] Added more ReSharper settings in solution.
[SharpDX] Fix bug so that MathUtil.NextLong can produce the specified max value

Previously, the largest value it could ever return was max - 1.

This also eliminates a divide by zero issue that happened when when max == min.
[SharpDX] BREAKING CHANGES: Remove obsolete NextDPointF and rename NextDPoint to NextPoint