- Added CString::Join
- Added CString::Convert
- Changed Alias::OnUserRaw
- Moved dependencies on string helpers to CString (breaks compatibility with versions of ZNC prior to this commit
- Renamed various variables to have more descriptive names

CString::Join works like python's string join, except that it takes 2 iterators (or pointers) instead of a whole collection
CString::Convert casts a string to another type using an intermediary stringstream.
Aliases are no longer bursted to the server all at once, but are sent line-by-line