first go at fixing app.width
whoops, minor typo fix
whoops, minor typo fix - 2
using getScrollbarsMode now
added overlay_scrollbars? method
Merge branch 'fix_app_width' of github.com:KCErb/shoes4 into KCErb-fix_app_width
Code style and public/private

* in JRuby we can call Java methods like ruby methods
* no parentheses for methods without arguments
Little refactoring/keeping it at 80 chars width