ENH: Display fps on the screen along with the render fps

Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

passed imstk-liones-linux-shared-debug

00:05:09

passed imstk-liones-linux-shared-release

00:03:22

passed imstk-marvin-windows-shared-debug+msvc2013+omni

00:02:47

passed imstk-marvin-windows-shared-release+msvc2013+omni

00:06:00

passed imstk-norkit-osx-shared-debug

00:07:58

passed imstk-norkit-osx-shared-release

00:04:31