Need convenience functions to aid in usage, development

[pprindeville]

The following functions would be useful:

• getting the cursor position into a variable
• setting the cursor position from a variable
• getting the parent position into a variable
• getting the path of the current cursor
• getting the name of the current node
• add anonymous strings to arrays
• get the index of an entry being added to an array

JSON isn't necessarily generated in a linear fashion per the source information being parsed to synthesize it. Therefore, being able to randomly access placekeepers in the tree would be useful. Note: it's not clear how to address unnamed objects.

[pprindeville]

Also note that the error message generated by json_select goes to stdout and not stderr.