registration_visualizer: Take iterations on command line
registration_visualizer: Display source cloud
extract_indices: Pull out all headers to make precompiled headers easy
extract_indices: Use savePCDFile instead of PCDWriter
extract_indices: Give extracted planes fixed colors
extract_indices: Write plane parameters to file
extract_indices: Don't use PCLPointCloud2
extract_indices: Use loadPCDFile instead of PCDReader
extract_indices: Use normals. Gives much better planes!
Enough std:: and pcl:: - kill them
pcl_viewer: Move forward/backward with KeyUp/KeyDown