v1.3

1. Add Script for Operating on Unit Quaternions:

   • Introduced a script for various operations on unit quaternions.

2. Update README:

   • Revised README to include usage instructions for the unit quaternion operations script.

3. Add Script for Converting Unit Quaternions to Euler Angles in Relion:

   • Added a script to convert unit quaternions to Euler angles (rlnAngleRot, rlnAngleTilt, and rlnAnglePsi) used in Relion.

4. Update README:

   • Updated README to cover the new conversion script for unit quaternions and Euler angles in Relion.