Merge pull request #496 from LLNL/features/zfp

Adding zfp package.

var/spack/repos/builtin/packages/zfp/package.py

+from spack import *
+
+class Zfp(Package):
+    """zfp is an open source C library for compressed floating-point arrays that supports
+       very high throughput read and write random acces, target error bounds or bit rates.
+       Although bit-for-bit lossless compression is not always possible, zfp is usually
+       accurate to within machine epsilon in near-lossless mode, and is often orders of
+       magnitude more accurate than other lossy compressors.
+    """
+
+    homepage = "http://computation.llnl.gov/projects/floating-point-compression"
+    url      = "http://computation.llnl.gov/projects/floating-point-compression/download/zfp-0.5.0.tar.gz"
+
+    version('0.5.0', '2ab29a852e65ad85aae38925c5003654')
+
+    def install(self, spec, prefix):
+        make("shared")
+
+        # No install provided
+        mkdirp(prefix.lib)
+        mkdirp(prefix.include)
+        install('lib/libzfp.so', prefix.lib)
+        install('inc/zfp.h', prefix.include)
+        install('inc/types.h', prefix.include)
+        install('inc/bitstream.h', prefix.include)
+        install('inc/system.h', prefix.include)