Thanks for your interest in the Intel Curie Platform.
I don't have information if there is a Curie library for Altium, nevertheless you should know that we are still working on the CAD files for the Curie. At the moment the only CAD files available are for the Arduino 101, you can find it in the following links:
1) https://software.intel.com/en-us/iot/hardware/curie/dev-kit Intel® Curie™ Module - Dev Kit | IoT | Intel® Software
2) https://forum.arduino.cc/index.php?topic=393153.0 https://forum.arduino.cc/index.php?topic=393153.0
I hope you find this information useful, have a nice day!
We don't have an exact release date, please keep tune with the Curie page (https://software.intel.com/en-us/iot/hardware/curie Develop for the Intel® Curie™ Module | Intel® Software ), we will be posting any updates in there.
We hope you have a nice day!