Adds an externally managed sprout-terminal cookbook

This commit adds the sprout-terminal cookbook to sprout-wrap.  This cookbook is managed outside of the core sprout repository and can be used as an example for how to define custom cookbooks to be included in sprout-wrap.  

Without changing any configuration the sprout-terminal cookbook will simply set the startup and default profiles to 'Basic' (which is the mac osx default) and will set the 'close window' setting to 'when terminal exits cleanly'.