Fixed not checking 'showExceptionGlobalVariables' and 'showExceptionLocalVariables'
php-error-handler: Fixed infinite recursion when an exception has a previous exception.
Fixed PrettyPrinter\ExceptionExceptionInfo to return the previous exception's own ExceptionInfo if it has one.
php-error-handler: Don't pretty print the properties of exceptions.
Fixed indentation
Simplified PrettyPrinter\Utils\Text
Made ErrorHandler\Exception remove constructors of the same object from the stack trace
Removed some unused imports