Removed New project button from projects#index

Too many projects are created without links to the contact. Removing the
+New button forces all project creation to be done on the contact pages.

Resolves #143
Added active stage alias and fixed stage search

Fixed #142 where the project stage dropdown failed to properly parse
existing stage parameters in the search field.

Resolved #144: Added "stage:active" where active is an alias for
(potential OR proposed OR contracted OR production OR shipped).
Project tweaks and bug fix