* export and import functions
* refactor + works for few primitives
* nit
* allow primitives with state
* nit
* nit
* simplify serialize / deserialize
* fix for constants
* python bindings
* maybe fix serialize failure case
* add example
* more primitives, training kind of works
* same result for python and c++
* some fixes
* fix export
* template it up
* some simplificatoin
* rebase
* allow kwargs and multiple functions
* exporter
* more primitives for exporting
* deal with endianness
* handle invalid stream
* add docstring
