fixed #38
Merge branch 'master' of https://github.com/phetsims/under-pressure
fixed #40
Changed the handling of bounds for the barometers to use MovableDragHandler, which simplifies the code.  Also just passed the layout bounds instead of the entire view to the constructor.  See #40.
* Changed the handling of bounds for the ruler to use MovableDragHandler, Also just passed the layout bounds instead of the entire view to the constructor.  See #40.
* Changed the handling of bounds for the ruler to use MovableDragHandler, Also just passed the layout bounds instead of the entire view to the constructor.  See #40.
change bounds in ruler now immutable operation
remove unnecessary import
Merge branch 'master' into 1.0
Updated version to 1.0.0-rc.2.