Make foodcritic happy.
Use the intall_method design pattern.
Make foodcritic happy.
Fix non default attribute file not loaded.

For some reason if an attribute is not defined using the following format, non default.rb attribute files do not get loaded:

correct format - default['foo']['bar'] = 'baz'
Add git install method.

This commit allows users to install the casperjs git repository.
Add travisci config file.

This commit adds a config file for a travisci hook we will implement.
For now we only lint the the cookbook using foodcritic.