Added getAll and self:: to allows to get a result of a query row by row
added test getAll
added getLastId to get the last inserted id
added getField
Fixed bug DB::configure() and added configuration in test and example in index.php
added DB::getExecutedQuery and test
added access modifier to all methods
added disconnect function
added disconnect
created example folder
added few examples
Merge pull request #1 from rainphp/master

Merging update