* VGA firmware

* VGA hardware

* Fix serial pin marks

* Remove old video

* 3D models

* Adjust copyright notes

* Move and rename VGA constants

* Adjust name in prompt

* VT escape commands

* HS mode for primary oscillator

* Enlarge serial and USB buffers

* Simple graphics

* 20MHz crystal to support USB

* Adjust USB and serial buffers

* Use PIC32MX270F256B to have video RAM for full VGA

* Fix cursor movement commands

* Adjust crystal value in schematics and PCB

* Adjust copyright notice and version

* Adjust setup screen layout

* Use 32-bit SPI transfers to avoid flickering

* Fix clear EOL/BOL commands

* Fix ESC E (CRLF) command

* Adjust PCB version

* 30/24 screen lines setting

* Adjust copyright