Removed unnecessary $xml parameter and removed unwanted brackets.

The parameter $xml on the static function toXml is not required as this parameter is being immediately overriden on line 31.

The addAttribute of variable $transacType does not return anything, so it doesn't required to be enclosed with brackets.
Undefined variable $transactionFile. Should read $this->transactionFile

Issue on line number 285
removed duplicate line of code on Line 316
Missing initialization of the RuntimeException when throwing on line 84
Merge branch 'master' of https://github.com/abishekrsrikaanth/litle-sdk-for-php into abishekrsrikaanth-master

Conflicts:
	lib/LitleOnlineRequest.php
	lib/Obj2xml.php
Merge branch 'master' of https://github.com/LitleCo/litle-sdk-for-php