Fixed a bug that caused the WaitHelper::TIMEOUT to be 0 when WAIT_TIMEOUT is not set.

The line
	TIMEOUT = ENV['WAIT_TIMEOUT'].to_i || 240
sets TIMEOUT to 0 if the WAIT_TIMEOUT is not set because nil.to_i is evaluated to 0 and the 240 is never assigned.
Merge pull request #5 from maciejtrybilo/timeoutFix

Fixed a bug that caused the WaitHelper::TIMEOUT to be 0 when WAIT_TIMEOU...