go cleanup, adding hub

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

@@ -0,0 +1,20 @@
+from spack import *
+
+class Hub(Package):
+    """The github git wrapper"""
+    homepage = "https://github.com/github/hub"
+    url      = "https://github.com/github/hub/archive/v2.2.3.tar.gz"
+
+    version('head' , git='https://github.com/github/hub')
+    version('2.2.3' , '6675992ddd16d186eac7ba4484d57f5b')
+    version('2.2.2' , '7edc8f5b5d3c7c392ee191dd999596fc')
+    version('2.2.1' , '889a31ee9d10ae9cb333480d8dbe881f')
+    version('2.2.0' , 'eddce830a079b8480f104aa7496f46fe')
+    version('1.12.4', '4f2ebb14834c9981b04e40b0d1754717')
+
+    extends("go")
+
+    def install(self, spec, prefix):
+        os.environ['GOPATH'] = os.getcwd()
+        bash = which('bash')
+        bash(os.path.join('script', 'build'), '-o', os.path.join(prefix, 'bin', 'hub'))