Support for floating point numbers without leading zeros

[zimmermm]

Hi Jacob
I'd be happy if your library supports the following floating-point number notations in the JSON file:

• .5 instead of 0.5
• 1.2D-5 as the notation for double-precision numbers

[jacobwilliams]

Be aware those are not valid JSON numeric values. But, I can add support for them as an extension (via an optional argument to initialize). I was also thinking of allowing positive numbers that start with + (also invalid in JSON).

[zimmermm]

yes, I am aware of that. We use JSON as an input-file format for our model. But now we use a calibration software where we can't control the number format. There are other workarounds for that but I thought if it is possible to extend your library to non-standard formats this would be a nice solution.
Support for comments would be a nice thing too but is also not valid.

[jacobwilliams]

Note: comments are supported! Use the optional comment_char input to initialize to set the character to use for comments (e.g., '!', '#' or '\').