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/coreutils/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Coreutils(Package):
+class Coreutils(AutotoolsPackage):
     """The GNU Core Utilities are the basic file, shell and text
        manipulation utilities of the GNU operating system.  These are
        the core utilities which are expected to exist on every
@@ -35,8 +35,3 @@ class Coreutils(Package):
     url      = "http://ftp.gnu.org/gnu/coreutils/coreutils-8.23.tar.xz"
 
     version('8.23', 'abed135279f87ad6762ce57ff6d89c41')
-
-    def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
-        make()
-        make("install")