Finished literals

- Added addliteral as a convenience function to core.init
- Added some extra log statements to matcher for easier debugging.
- Added some checks that allow bypassing copying the argument of the operation instruction
- Fixed a few bugs in createNewContext, which would send a token for a literal back to the instruction that created it.
- Added literal parsing to the reader
- Added documentation for DIS literals
- Updated the example to include literals
- Updated the language file to include the new syntax for literals