extend multi-slit language to support bitmap masks; Binary pbms not parsed correctly yet, working on it

reduce duplication with delegating constructor, remove unused and not fully implemented constructors

modified:   optimizer/Drivers/pisa-opal/pisa-opal.cpp
modified:   optimizer/Expression/CMakeLists.txt
new file:   optimizer/Expression/NumberOfPeaks.cpp
new file:   optimizer/Expression/NumberOfPeaks.h
modified:   optimizer/Util/PeakReader.cpp
modified:   optimizer/Util/PeakReader.h
modified:   src/Optimize/OptimizeCmd.cpp

Revert "Merge branch 'master' into 'master'"

See merge request !40

This reverts merge request !39

Master

See merge request !39

check if expressions are unique for sample and optimize command; add default values in option description

IPPL/FFT cleanup:
- header added to file
- obsolete files removed
- line indentation fixed
- required functions and macros moved from c_utils.{c,h} moved to fftpack.cpp