package : added EditableMakefile

Modifications :
- added EditableMakefile to PackageBase subclasses
- astyle modified as an example
- preliminary hook to stop at a certain phase of install

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

@@ -24,16 +24,10 @@
 ##############################################################################
 from spack import *
 
-class Blitz(Package):
+
+class Blitz(AutotoolsPackage):
     """N-dimensional arrays for C++"""
     homepage = "http://github.com/blitzpp/blitz"
-    url      = "https://github.com/blitzpp/blitz/tarball/1.0.0"
+    url = "https://github.com/blitzpp/blitz/tarball/1.0.0"
 
     version('1.0.0', '9f040b9827fe22228a892603671a77af')
-
-    # No dependencies
-
-    def install(self, spec, prefix):
-        configure('--prefix=%s' % prefix)
-        make()
-        make("install")