rm some uses of Boost

enabled an automatic merge when the pipeline for e83fa712 succeeds

aborted the automatic merge because source branch was updated

added 2 commits

• 2f845d5f - rm duplicate include
• 74a55a62 - correct split function

Compare with previous version

enabled an automatic merge when the pipeline for 74a55a62 succeeds

aborted the automatic merge because source branch was updated

added 9 commits

• 4f569df6 - rm boost include
• 427c329d - to_lower w/o boost
• 69ba501d - replaceItemsFromString w/o boost
• 222eca4f - ditto for Base::String::split
• c5252971 - clang-format
• df87f1f7 - replace include
• 3922e47f - replace boost in Fit/Tool/StringUtil.cpp
• 53c25f35 - rm duplicate include
• a1deb447 - correct split function

Compare with previous version

merged

mentioned in commit b7b6efc3

Note: cyl_bessel_k still cannot be taken from std because of lacking support under Apple clang.