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Implemented an offset based tracekill for STF.
Makefile in par folder has now two new targets:
1. make install, do an install from precompiled files
2. make reinstall, do a clean install

! IFOS -> IFOS2D !
- New make targes is IFOS2D
- Generated binary is IFOS2D

Adding 2D to IFOS to indicate, that it is our 2D FWI Code.

! This commit renames DENISE to IFOS !
Keep care and update all of your self written shell scripts etc.
The make target is 'IFOS' (capital letters).
The resulting binary is called 'IFOS' as well.

Update: Merge test