* reformatted the entire document to look pretty in both standard text and
Markdown
* incorporated [my OS X 10.8 build instructions with Homebrew as the package
manager](http://bitcoin.stackexchange.com/questions/3672/trouble-compiling-bitcoind-on-osx-with-homebrew/5253#5253)
* incorporated @gavinandresen's MacPorts and release build instructions based on
an earlier revision of this commit
* added makefile patch necessary for Homebrew compilation to `contrib`
