Version 1.0.3; fixed SVG issues and improved playback & import

Changed the way SVG is used to ensure that drawPicture is not used
directly in onDraw (now using SVGView). As a result, now targeting the
latest SDK version (17)
Tweaked colours and highlights to improve display on newer devices
Improved playback to hide playback bar (as in MediaPhone)
Fixed a playback issue on newer devices (Android MediaPlayer start is
far slower after API 4.1; now timing instead of assuming particular
file durations)
Improved bluetooth import (previously the preferences option was
unreliable)
Improved first launch to always show a scroll bar as a further hint