remove unused codes in menu.php
use defines instead of variables to access $op, $route etc
fix earlier commit and restructure init and index
typo
MAJOR: webservices remove 'ta' or type of action and replace it with 'op'
strtoupper _OP_
MAJOR: rename menu.php to main.php
MAJOR: rename all app=menu with app=main
rename more app=menu with app=main