ice - fixed sha1 hash

Old hash was incorrect.
libewf - fixed download link and env

Fixed download link (was no longer available at old location) and also set env to std.
fswatch - new formula

Added fswatch, a handy osx analog of ionotify to watch for filesystem changes and then execute a script.
perl518 - new formula

No idea why there isn't a formula for perl518. I grabbed this from https://github.com/zsmizzle/homebrew-versions/blob/perl518/perl518.rb
fswatch-stdout - alternate version of fswatch

Alternate version of fswatch that outputs changed paths to STDOUT
fswatch - removed test

you can't test it that way :-)
fswatch-stdout - removed test

you can't test it that way :-)
Merge branch 'master' of github.com:mlevin2/homebrew