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

Master CMake script: new option 'USE_STATIC_LIBRARIES' added. This is on by default. If set to off shared libraries are used if available

add a renormalization to the low current case such that the correlation matrix is cholesky decomposable