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/xorg-sgml-doctools/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class XorgSgmlDoctools(Package):
+class XorgSgmlDoctools(AutotoolsPackage):
     """This package provides a common set of SGML entities and XML/CSS style
     sheets used in building/formatting the documentation provided in other
     X.Org packages."""
@@ -37,9 +37,3 @@ class XorgSgmlDoctools(Package):
 
     depends_on('pkg-config@0.9.0:', type='build')
     depends_on('util-macros', type='build')
-
-    def install(self, spec, prefix):
-        configure('--prefix={0}'.format(prefix))
-
-        make()
-        make('install')