Massive conversion from Package to AutotoolsPackage (#2845)

* Massive conversion from Package to AutotoolsPackage

* Forgot to convert p4est to AutotoolsPackage

* Fix typo

* Fix broken link in docs

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

@@ -25,16 +25,10 @@
 from spack import *
 
 
-class Protobuf(Package):
+class Protobuf(AutotoolsPackage):
     """Google's data interchange format."""
 
     homepage = "https://developers.google.com/protocol-buffers"
     url      = "https://github.com/google/protobuf/releases/download/v2.5.0/protobuf-2.5.0.tar.bz2"
 
     version('2.5.0', 'a72001a9067a4c2c4e0e836d0f92ece4')
-
-    def install(self, spec, prefix):
-        configure("--prefix=" + prefix)
-        make()
-        make("check")
-        make("install")