Merge pull request #158 from claudioandre/unstable-jumbo

Fix a bug inside get_binary.
Fix a bug in rar2john - it tried to fclose() twice.
Add big-endian versions of our dump_stuff() debug functions.
Allow running an OpenCL build with no platforms detected.
des-opencl:fixed detection of matching salt
Merge pull request #159 from Sayantan2048/unstable-jumbo

des-opencl:fixed detection of matching salt
Drop UTF-8 test from Markov. The performance impact is not worth it. For slow
formats we could use an external filter.
OpenCL crypt-md5: Get rid of global memory use in inner loop. More effective
buffer use and some other tweaks. Significant boost on both nvidia and AMD.
A few more md5crypt-opencl tweaks, mostly cosmetical.
50% performance gain on GCN for sha512crypt. Recommended for (at least) 12.08 Catalyst driver.
From:
  Local work size (LWS) 64, global work size (GWS) 16384
  Benchmarking: sha512crypt (rounds=5000) [OpenCL]... DONE
  Raw:	8316 c/s real, 409600 c/s virtual

To:
  Local work size (LWS) 64, global work size (GWS) 16384
  Benchmarking: sha512crypt (rounds=5000) [OpenCL]... DONE
  Raw:	12603 c/s real, 546133 c/s virtual