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/jpeg/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Jpeg(Package):
+class Jpeg(AutotoolsPackage):
     """libjpeg is a widely used free library with functions for handling the
     JPEG image data format. It implements a JPEG codec (encoding and decoding)
     alongside various utilities for handling JPEG data."""
@@ -35,10 +35,3 @@ class Jpeg(Package):
 
     version('9b', '6a9996ce116ec5c52b4870dbcd6d3ddb')
     version('9a', '3353992aecaee1805ef4109aadd433e7')
-
-    def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
-
-        make()
-        make("test")
-        make("install")