Added a `resize` function to `me.Rect` and made the `adjustSize` one obsolete
Camera code cleaning and improvements (see details)

- Updated the deadzone code using a me.Rect object
- [#256] Replace the current limit vector by a rectangle defining the
camera bounds

currently broken, so committing on a different branch !
[#256] fixed `bounds` creation and limit check

(tracking other potential regressions before commiting back to the main
branch)
[#256] removed the `setBounds` function from example since the setter function are now accessible through the `me.Rect` object
Fixed/Cleaned the deadzone code check

todo: figure out a cleaner way to manage/set deadzone
note : the _followX() function would deserve a clean rewrite as well :)
Merge branch '1.0.0-viewport-update' into 1.0.0-dev
Changelog update