fix URL for nlwrite.pdf
Add changelog entries
Extra newline after 'NL model conversion time ...'
NLWriter: CMake option NLW2_LIB_DMGAY_DTOA #30
NLWriter: use_std::to_chars() #30
Baron fixes for clang compilation
Merge branch 'develop' into mosekmp
To 42881fa: x-visitor use QuadCon(LE/EQ/GE)
Bump version