Cat-Printer 0.6.0.2

The version code may seem minor, but it was a big work. Good fixes included.

Update and enjoy better performance! Try out the new image "filter" named "Pattern"!

Note that previous config will be reset after this update, to keep consistency

Other changes:

• Test unknown devices (scan everything around)
• Rework of Web FE Event, removing duplicate dispatches
• Optimized image processing algorithm
• Some fixes to CSS