Add Variable handling Functions (version 0.4.0)

* Fixed input octal, hexadecimal and exponential numbers (Interpreter.php)
* Fixed show array in variable for DebugVievFix output array in variable for DebugViev
* Fixed how isset() behaves when passed string offsets (same as PHP 5.4)
* Fixed ternary operator in parentheses testRun_echo_ternary_9() 10, 11, 12

Change-Id: I88159764323e37f8e561661154ab649acdc4b30f
Merge "Add Variable handling Functions (version 0.4.0)"