benchmarkInstallation.py

```
$ cd examples
$ python benchmarkInstallation.py
System Setup
  NonbondedMethod: PME
  NonbondedCutoff: 1 nm
  Constraints:     HBonds
  Timestep:        2 fs
  Number of atoms: 23558

Platform: OpenCL
  OpenCLDeviceIndex: 0
  OpenCLDeviceName: GeForce GTX 660
  OpenCLPlatformIndex: 1
  OpenCLPlatformName: NVIDIA CUDA
  OpenCLPrecision: single
  OpenCLUseCpuPme: false

  Performance = 29.771 ns/day

Platform: CUDA
  CudaDeviceIndex: 0
  CudaDeviceName: GeForce GTX 660
  CudaUseBlockingSync: true
  CudaPrecision: single
  CudaUseCpuPme: false
  CudaCompiler: /usr/local/cuda/bin/nvcc
  CudaTempDirectory: /tmp

  Performance = 40.578 ns/day

Platform: Reference
[... takes a long time ...]
```