Error handling upgrade complete (+other interesting info)

The next focus is implementing OCTAL via the &O prefix
This is difficult because (like &H) it can appear in so many different parts of a BASIC program (.BAS CODE, DATA, files being read, input from keyboard, etc.) and requires different checks based on the context it is being used in (so a copy paste doesn't usually suffice).

RE: The suggested update to be released tomorrow
Don't expect any more updates till I release Demo #7 at the end of this month.

The focus of Demo #7 was fixing incompatibilities. So what will be the focus of Demo #8? Implementing user defined types