New: toggling orientations, vida pane dimensions update on page resize

-Can toggle between horizontal and vertical orientations now

-pageHeight/Width update when page is resized

Fixes #3
Fixed: moved verovio options to settings objects, renamed functions for clarity's sake

-Switched out versions of verovio-toolkit.js (non-versioned is https://github.com/rism-ch/verovio/commit/bedd33b4e4b79b9889c153b10837433c4edeb9f1)

-Added verovio options to settings objects

-Added reloadOptions/reloadPanel functions to (eventually) reload the current data with new settings

-Renamed changePage/newPage to changeMusic/musicData for clarity's sake