Jacob Carlborg's OSX installer now available

[Andrei Alexandrescu]

Try it out! http://dlang.org/download.html. I managed to automate 
everything in one makefile - you type a command and next thing you know 
the file is up there.

https://github.com/D-Programming-Language/installer/commit/34fb6613fca77e0e75cadf5545560e799a8c82b2 


On my machine it installed fine the first time around, the second time 
I've had an error.


Andrei