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# Conflicts:
#	src/IFOS2D.c

I removed the zero phase option from the code, due to complications depending on the source signal and the time window. However, from a technically point of view it was implemented right.

Position 7 in workflow is now F_HIGH_PASS.
All other parameters have been shifted.

The model, which is used in the step length estimation is outputted if VERBOSE is set to 1.

Both L2-misfits are now normalized at each iteration. Therefore, both objective functions should be weighted equally.

The sinus3 source wavelet was shifted in the wrong direction.

Added references to D. Koehn's dissertation. Large parts of the theory are extracted from his dissertation.

Position 7 in workflow is now F_HIGH_PASS.
All other parameters have been shifted.

The vector FL was allocated before the value L was exchanged.

This fix will reset the conjugate gradient history each time a frequency or workflow stage is switched.
If such a stage is switched we will have a "new" objective function, thus, it makes no sense to use the old gradients for speeding up the convergence.
This bug was the reason why the objective function could not be reduced for 2-3 iterations after a new frequency stage was appplied.

I switched the naming of the variables of the frequency filtering to a more clear and easy one.
The change affects the JSON input file and the code itself.
The following renaming is used:
FC_START -> F_LOW_PASS_START
FC_END   -> F_LOW_PASS_END
FC_INCR  -> F_LOW_PASS_INCR
FC_EXT   -> F_LOW_PASS_EXT
FC       -> F_LOW_PASS
F_HP     -> F_HIGH_PASS

However, old JSON files will also work for now. If one of the old variables is not found, IFOS will search for the corresponding old one. This option will be removed in a future release.

This option is not supported anymore. Therefore I remove it from the source code.