Small cleanup
Changed Singleton implementation to use SQLite
Centralised database settings and data
Changed database layer to use PDO
Updated Database singleton to execute prepared statements
Tests for prepared statements, fixed tab spaces.
Merged Decorator changes into repo
Merge branch 'master' of git://github.com/Sethathi/Design-Patterns-With-PHP

Conflicts:
	Command/SMS_notification.php
	Command/commandClient.php
	Singleton/Database.php
Minor changes
Added .gitignore file
Added implementation of Template Method pattern: An abstract tariff calculator which defines the algorithm and two concrete calculators
Updated README
Merge pull request #2 from myanimal/master

PDO/SQLite implementation and Template Method pattern