Make Assemble version more dynamic

So we don't need to update everytime a new version of Aasemble come out. User still can enter new version of Aasemble manually.

Also remove bloated prompts for github username, repository, homepage, and bugs.
update devDeps
fix username in gruntfile
already in package
use handlebars-helper-br package
Merge pull request #12 from hariadi/master

various fixes