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Fix Codacy issues (always true / always false)
Fix compiler warnings caused by Leptonica (-Wold-style-cast)
Remove SW_BUILD option from CMake and CI
Replace call of exit function by return statement in main function
Remove more unused function parameters
Convert enum to class enum in several files
Replace some tprintf by tesserr stream (fixes Windows compiler warnings)
Document hidden combo flags
Fix Leptonica URLs
Avoid unnecessary conversions from std::string to char pointer
Optimize performance with clang-tidy
Replace malloc / free by new / delete
Replace 'can not' by 'cannot'