Added the possibility to use png instead of svg for background image ; when using a svg background, convert it to bitmap a load time (faster to draw).
For Bang, Toggle and Slider, at init time or when receiving a 'set', 'bang' or 'float' message, don't send value or bang anymore because libpd already do it.
Merge remote-tracking branch 'upstream/master'
Enabled use of png images for widgets. Corrected Touch image loading (now image file is based on sendname).
Added Knob widget, related to moonlib's 'mknob' external.
Added DroidSystem object, bringing sensors functionality (accelerometer, gyroscope, magnetometer), vibrator triggering, and 'gotoUrl' (open browser) system call.
Merge https://github.com/Ant1r/PdDroidParty