Principia 1.3 - Christmas Update

Hey everyone!

Later today, Principia 1.3 will be out on Google Play. This is our Christmas gift to you.

Principia 1.3 - Christmas Update
* Huge performance improvements, up to 300% boost on big levels
* Performance improvements to all effects
* Triangle waveform added to synthesizer
* Almost all objects now have proper descriptions
* The camera now moves automatically when you drag an object against a screen border
* New level property: Do not require dragfields
* Power Supply max voltage doubled to 48V
* New object: Cursor Field, an invisible, resizable touch-detector. Alfajim, this is what you should use for your synth and piano. ;)
* Added object quickadd dialog (search by name)
* New sandbox menu category sorting
* Improvements to sandbox menu
* New object: Lua Script. Yes, you read that right. You can now create your own objects by scripting them in Lua (very easy scripting language).

The Lua Script object is very experimental. It has 4 inputs and 4 outputs, and you can access these easily inside your script. If your script runs for more than 50 ms (per electronics tick), it will be terminated.
Planned features of the Lua Script object:
- Full networking support (so you can create your own multiplayer games!)
- Basic sprite rendering

Minor fixes
* Jumper now has a precision-value dialog
* Damage slider added to Spikes
* Increased max zoom-out of Cam Marker
* Bugfix: Linear decay slider error
* Bugfix: Checkpoint only worked in layer 1
* Bugfix: disconnected sockets "remembered" their last value
* Improvements to adventure robot