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/uncrustify/package.py

@@ -25,15 +25,10 @@
 from spack import *
 
 
-class Uncrustify(Package):
+class Uncrustify(AutotoolsPackage):
     """Source Code Beautifier for C, C++, C#, ObjectiveC, Java, and others."""
 
     homepage = "http://uncrustify.sourceforge.net/"
     url      = "http://downloads.sourceforge.net/project/uncrustify/uncrustify/uncrustify-0.61/uncrustify-0.61.tar.gz"
 
     version('0.61', 'b6140106e74c64e831d0b1c4b6cf7727')
-
-    def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
-        make()
-        make("install")