April-2020

Added visit_async() and single_act_visit_async() methods
Enhanced documentations
Fixed many codacy complains
Fixed a glitch in DateTime related to nanoseconds
Added Conan package support, thanks to @yssource
Added get retype_column() method
Added load_align_column() method
Brought the whole codebase to 100% compliance with C++ standards (using _GLIBCXX_DEBUG)