phantomjs 1.9.1

Closes #20307.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Add class name to method_added error
specialties: point to valid examples
Warn when overriding ScriptFileFormula#install

ScriptFileFormula's use is that it installs whatever was downloaded
to bin; if the install is overridden, there's no benefit over deriving
directly from Formula.
ack: use Formula
cloc: use Formula
ttytter: use Formula
Implement resources
Use resources
wip
wip
wip