Brandon neweclipseplugin5

Added validation...
- All validators pass, then next page button enables.
- Adde the first input validator, for ProjectName. 

Whats nice is the GXT validators are just like the EMF binding validation. Which seems to be working out great. I need to add the other input validators. Once I finish the validators, I can move to selecting the archetype, which I can use restassured library to quickly grab the data, and I've already developed domain model and objects for my directory project. With The Window builder its helping to make it go quite quickly.

Project name validation example: Also notice it syncs the next button too. 
![screen shot 2013-05-05 at 10 53 02 pm](https://f.cloud.github.com/assets/1326504/464840/024bf3ee-b612-11e2-9e80-56b414815356.png)

Good project name validation:
![screen shot 2013-05-05 at 10 53 38 pm](https://f.cloud.github.com/assets/1326504/464842/18d31ea8-b612-11e2-8085-978e34572bcc.png)