bring modifications from branch NEW-GATEWAY to branch MASTER

There was interresting development done in the NEW-GATEWAY branch.
Sadly NEW-GATEWAY branch was based on Kalkun 0.6
This commit brings old development into current MASTER branch.
Intended to be a fresh start for more coding :-)
Direct gateway script for T-Mobile CZ

Idea based on Kamil Paral's esmska project. Credit to him.
PHP/CURL implementation by jbubik - heavily based on existing direct
gateway scripts way2sms_model.php and gammu_model.php
Security consideration: your system/cache folder MUST be protected
Without proper .htaccess file, your stored cookies are publicly
accessible via HTTP. Anyone could send via your account!
Implement database functions for Alternate Gateways

Added nongammu_model.php as a superclass for all Alternative Gateways.
Implemented:
 - a stub function for sending message (really_send_massages())
 - saving a message to sentitems after sending
 - saving a message into outbox for to-be-postponed messages
 - processing of postponed messages from outbox
 - crontab script for periodic executing
Improvement of Alternate Gateway TMobileCZ
Merge pull request #149 from jbubik/master

Database handling improved for Alternate Gateways