Final (AFAICS) update from Subversion - copy changes to cfgetline.  It no
longer needs the size parameter, nor the special handling; it just uses
talloc_get_size internally to know how much space has been allocated to
the string (since it's going to use talloc_realloc anyway).  It now
returns boolean whether the read was successful or not.
Adding some basic documentation of the project as a whole.