1313e/PRISM: v1.2.2

This is the v1.2.2 release of the PRISM package and serves as a minor patch/optimization.

New additions:

• Added the f_impl emulator parameter to PRISM, which is used to artificially inflate the prior emulator variance of all known samples;
• Emulators made with a version earlier than this one, will have the value of f_impl set to zero when loaded.

Bugfixes:

• The poly_terms Emulator property now returns the proper polynomial terms.

Changes/Optimizations:

• All different uses of the residual variance in the emulator are now pre-calculated, making emulator evaluations faster.