Implements the new 7-bit opcodes

Implements the new 7-bit opcodes

Added a map file export

Added a map file export

v0.5.1: Added ENTERI and LEAVEI pseudo instructions

- Added ENTERI and LEAVEI pseudo instructions.
- Added pseudo instructions and directives to the
  instruction sheet.
- fixed some bugs

v0.4: Added support for von Neumann architecture

Added support for von Neumann architecture: You can place
the ram data origin with the new .dorg [addr] directive.
In this case the "constants copy" header is omitted, and constant
data is placed directly in the code section.

v0.3: - better support for high resolution displays

- improvements on the tcp client witch controls digital

v0.2.2

added instruction set summary to release zip

v0.2: better integration with Digital

- better integration with Digital
- added a RETI instruction

v0.1.1

better debugging support

v0.1

initial release