fix(modal): enhance modal.open() to calculate
    initial modal y-offset correctly on IE9
fix(modal): eliminate test jshint issues
Merge branch 'fix_modal_ie9_pos' of git://github.com/dcfsc/angular-foundation into dcfsc-fix_modal_ie9_pos
refactor(modal): Only use pageYOffset to calculate initial position
fix(topbar): Fix position calculation for IE

IE does not define scrollY. It defines pageYOffset which is an alias for
scrollY in other browsers.