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/py-xpyb/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class PyXpyb(Package):
+class PyXpyb(AutotoolsPackage):
     """xpyb provides a Python binding to the X Window System protocol
     via libxcb."""
 
@@ -39,9 +39,3 @@ class PyXpyb(Package):
     depends_on('libxcb@1.5:')
 
     depends_on('xcb-proto@1.7.1:', type='build')
-
-    def install(self, spec, prefix):
-        configure('--prefix={0}'.format(prefix))
-
-        make()
-        make('install')