Fixes and additions:
* Fixed bug in pos processing of RPLError
* Fixed parsing bugs eg 1} and 1#
* RPL.parse can now take a dupNames kwarg, may add more later.
* Added RPL.__unicode__ and RPLStruct.__unicode__
* RefString now ends in a , cause multistr
* Added calc struct to std's help.
* data struct now export structured data (yayyy)
* Began support for JSON export.
* Added data.type key to define a type explicitely. Defaults to inferrence from$
* Added format.comment, same as data.comment
* Removed pretty from format's help docs.