Changes (all backward compatible!):

• a few minor improvements to comments
• fixes loadLibrary return type (it can now return null, which is then handled by caller)
• adds a new library path for osx/brew (see also link in comment)
• tiny simplification to cpp script to avoid HEREDOC interpolation
• changed all HEREDOCs to NOWDOCs (among other things, doesn't require escaping dollar signs etc)
• changed all NOWDOC terminators to "CPP" - participating IDEs can highlight the code in those strings properly based on that

While the change in return type should fix the error from #221, hopefully adding the extra search path also fix the root cause behind it too.