Added a CommandWithTerm Class (Version 2)

Added new subcommands wp user term and wp post term. 

Created a new pull request to follow contribution guide lines. 

Related #1474 
Still confused by this. See examples 

![screen shot 2014-12-01 at 00 13 16](https://cloud.githubusercontent.com/assets/237508/5239990/efeb7d86-78ee-11e4-8dd5-bad627517de2.png)
![screen shot 2014-12-01 at 00 13 09](https://cloud.githubusercontent.com/assets/237508/5239991/efed0034-78ee-11e4-8768-c0d29a7bcda1.png)