Add support for the Samsung NX1
Samsung has yet again come up with a new compression format that's quirky and doesn't seem to compress particularly well. I figured out the format by reading the open-source code of the Samsung DNG converter found at opensource.samsung.com but the code is all new. I've verified that the decompressed output is identical.
Merge pull request #57 from pedrocr/nx1-support

Add support for the Samsung NX1