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/sparsehash/package.py

@@ -25,15 +25,9 @@
 from spack import *
 
 
-class Sparsehash(Package):
+class Sparsehash(AutotoolsPackage):
     """Sparse and dense hash-tables for C++ by Google"""
     homepage = "https://github.com/sparsehash/sparsehash"
     url      = "https://github.com/sparsehash/sparsehash/archive/sparsehash-2.0.3.tar.gz"
 
     version('2.0.3', 'd8d5e2538c1c25577b3f066d7a55e99e')
-
-    def install(self, spec, prefix):
-        configure('--prefix=%s' % prefix)
-
-        make()
-        make("install")