Add controller's status to event buffer
I correct that it was pointed out in my pull request
・src/java/org/lwjgl/input/Controllers.java, line 265: Should be "The timestamp assigned to the current event"
・src/java/org/lwjgl/input/JInputController.java, line 211: Consider splitting on two lines.
Merge pull request #39 from momokan/controller_event_buffer

Add controller's button state, x and y axis value to the controller's event buffer.