1) makes sign in button larger
2) changes "Current Shop" menu text to "Sign In" for normal user
3) takes all users after submitting contact to Sign In page rather than only new users.
1) Pages will go back to shop_welcome (original behavior) but for these two pages. This prevents transaction pages from going back.
2) Added an About/Help link to the left.
3) Changed the width/margin of the associated tables so that it would line up withe new table presenting the menu links.
