PDAL/PDAL — pull request #324 by gadomski (2014-04-25 18:41:12+00:00)
Title: Add a sbet writer

This writer can create sbet files, which store IMU data. Since the sbet format is pretty dumb (just a struct), this writer is as well.

One question, for the writer, should I be using pdal::StreamManager to work with my output stream? For now, I'm keeping it simple and managing the stream myself, but if we prefer using those utility classes I can switch over to the StreamManager.