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/xclipboard/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Xclipboard(Package):
+class Xclipboard(AutotoolsPackage):
     """xclipboard is used to collect and display text selections that are
     sent to the CLIPBOARD by other clients.  It is typically used to save
     CLIPBOARD selections for later use.  It stores each CLIPBOARD
@@ -45,9 +45,3 @@ class Xclipboard(Package):
     depends_on('xproto@7.0.17:', type='build')
     depends_on('pkg-config@0.9.0:', type='build')
     depends_on('util-macros', type='build')
-
-    def install(self, spec, prefix):
-        configure('--prefix={0}'.format(prefix))
-
-        make()
-        make('install')