Merge pull request #879 from DavidPoliakoff/feature/package/raja

Added a package for the RAJA system

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

+from spack import *
+
+class Raja(Package):
+    """RAJA Parallel Framework."""
+    homepage = "http://software.llnl.gov/RAJA/"
+
+    version('git', git='https://github.com/LLNL/RAJA.git', branch="master")
+
+    def install(self, spec, prefix):
+            cmake('.',*std_cmake_args)
+            make()
+            make('install')