Issue #4374

 - Added for as a defining keyword
 - Added new types and operators
 - Fixed numbers so basic integers are represented
 - Identifiers can now be surrounded with backticks
 - Properties and #/@ instructions are now distinct, with the latter represented as a builtin type
 - Properties are now matched before punctuation. Code can now fold.
 - Remove the regexp checking as that syntax does not currently exist in Swift
 - Added tests

- remove non-swifty keywords
- remove repeated keywords
- rearrange in more logical way

Fixes #3842.

Issue #3766

Closes #3680

And a number of other issues

Issue #3346