Brandon neweclipseplugin4

Added some logic for project creation and workspace path. 

- Displays error when project already exists. 
- Override workspace path to different location and resets when returning. 

![screen shot 2013-05-05 at 8 34 26 pm](https://f.cloud.github.com/assets/1326504/464684/f98deaca-b600-11e2-849b-cd6d9f42cd7c.png)