SimPHY 2.8 released

Simphy 2.8 version is mainly focused on updating graphing module and fixing some critical bugs especially in touch screen devices.

Now we can choose multiple units to plot together
Graphs can be stacked over one another, useful especially when units are different
Graph legends are displayed on graph itself to allow showing/hiding them quickly
Graph has option to take continuous input or plot data for a defined interval
Graph has option to update after a pre defined number of frames, which lets user to collect data after every fixed interval of time.

Fixed improper handling of touch events at some places in circuit simulator and during picking of objects
Multiple mouse events received in single frame are stored in array and passed one by one to event handler
Context menu event is triggered from system event rather than creating explicitly from right click event
Canvas now supports High DPI screens having non integral scale factor
Zoom and simulation speed control sliders are set as non movable to allow changing value with one touch
Updated geometry and circuit module to interact with touch/pen