Moved index.php contents to modules

admin/login.php: fix for login when updating from previous database and
actionRecorder module is not set in old database.

Moved What's new, greetings message and upcoming products to modules.
Moved greetings text from includes/languages/english.php to
includes/languages/english/modules/boxes/bm_greetings.php
Moved greetings text from includes/languages/english/index.php to
includes/languages/english/modules/boxes/bm_new_products.php
Removed includes/languages/english/modules/upcoming_products.php for
inclusion on
includes/languages/english/modules/boxes/bm_new_products.php
Removed unused variables from includes/languages/english/index.php
Removed tep_customer_greeting from general.php
Fix for admin when upgrading from previous db

admin/login.php: fix for login when updating from previous database and
actionRecorder module is not set in old database as seen here:

http://forums.oscommerce.com/topic/368149-error-the-maximum-number-of-login-attempts-has-been-reached-please-try-again-in-5-minutes/page-2