Fixed `DONE` command to work with Lua 5.1 and 5.2 when breakpoints are set.
Updated documentation for Lua 5.3 support and added features.
Added `basedir` method to explicitly set basedir when needed.
Updated CHANGELOG for 0.61.
Extended check for `mobdebug.loadstring` result (pkulchenko/ZeroBraneStudio#387).