Add value constants

We don't need true false and Null since the python values do a good enough job
of that. We also omit the universal object, since we'll take care of that
elsewhere.

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Add uobject method

A constructor for universal objects. Similar signature to dict()

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Fix early DECREF

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Fix possible object leak

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Use PyDict_Next in ason_parse

This is much more correct and saves a lot of code and heartache.

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>
Make pyobject_to_ason use PyDict_Next

Signed-off-by: Casey Dahlin <casey.dahlin@gmail.com>