N/I indication + descriptions; some opcodes

[Cosmicore]

• Updated Todo
• Added “export.c” for cmake
• N/I indication and differentiation with MISSING for all 5 tables (including five more tables in newalis)
• RRQ PC: fswitch = 0 on loading main
• RRQ PC: cswitching is N/I (fswitch is not set to 1)
• RRQ PC: cengine is N/I
• • variables xlocate, ylocate, theconfig
• opcodes clocate, ctab (with xlocate, ylocate)