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/atk/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Atk(Package):
+class Atk(AutotoolsPackage):
     """ATK provides the set of accessibility interfaces that are
        implemented by other toolkits and applications. Using the ATK
        interfaces, accessibility tools have full access to view and
@@ -43,8 +43,3 @@ def url_for_version(self, version):
         """Handle atk's version-based custom URLs."""
         url = 'http://ftp.gnome.org/pub/gnome/sources/atk'
         return url + '/%s/atk-%s.tar.xz' % (version.up_to(2), version)
-
-    def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
-        make()
-        make("install")