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/itstool/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Itstool(Package):
+class Itstool(AutotoolsPackage):
     """ITS Tool allows you to translate your XML documents with PO files, using
        rules from the W3C Internationalization Tag Set (ITS) to determine what
        to translate and how to separate it into PO file messages."""
@@ -37,8 +37,3 @@ class Itstool(Package):
     version('2.0.1', '40935cfb08228488bd45575e5f001a34')
     version('2.0.0', 'd8c702c3e8961db83d04182c2aa4730b')
     version('1.2.0', 'c0925f6869e33af8e7fe56848c129152')
-
-    def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
-        make()
-        make('install')