I'm not sure what you mean.  All the code is on github.  But we can't have regular users installing Xcode, Python, Qt4, etc, and compiling from source.  Unfortunately, to make a standalone installer, all that needs to be included somehow.  

Actually, I just got a PM from someone who claims to have done something like this already!  He's stuck in the Newbies forum, but will post here soon.  He said was able to jam everything into a .app and it works.  But it's 232 MB.  I suspect that most of it can be pruned out.  For reference, the Windows installer (*.msi) has everything and is less than 20 MB.

Question:  is *.app what I want?  Is that a sign-able container?  Is it easily converted to a .dmg? Or pkg?  What do I want?  (I don't even know, myself)

EDIT: upon reviewing what he said, I suspect that 180 MB is instantly removable:  the entire cppForSwig directory and the .git directory.  If so, this may already be in a usable state.   Anyone have comments about the idea of bulk including a python installation, PyQt4, etc?  It would require me updating them when necessary, but on the other hand, it reduces the number of libraries that are system-dependent (and thus, probably also increases security a bit).