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/htop/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Htop(Package):
+class Htop(AutotoolsPackage):
     """htop is an interactive text-mode process viewer for Unix systems."""
 
     homepage = "https://github.com/hishamhm/htop"
@@ -34,8 +34,3 @@ class Htop(Package):
     version('2.0.2', '7d354d904bad591a931ad57e99fea84a')
 
     depends_on('ncurses')
-
-    def install(self, spec, prefix):
-        configure('--prefix=%s' % prefix)
-        make()
-        make('install')