* removed caffe

* added caffe submodule

* Caffe submodule: Updated doc & old Makefile installer

* More elegant alternative to submodule initialization

* CMake downloads Caffe

* Remove the boost dependencies in fileSystem.cpp

* build ok

* Update fileSystem.cpp

Getting Non valid scaleNetToOutput:
if (scaleNetToOutput == -1.f)
                            error("Non valid scaleNetToOutput.", __LINE__, __FUNCTION__, __FILE__);

std::pair<int, std::string> PoseGpuRenderer::renderPose(Array<float>& outputData,
                                                            const Array<float>& poseKeypoints,
                                                            const float scaleInputToOutput,
                                                            const float scaleNetToOutput)
expects 4 parameter.