rsync 3.1.0

Rsync version 3.1.0 was released on September 28, 2013. See the [release NEWS](http://rsync.samba.org/ftp/rsync/src/rsync-3.1.0-NEWS) for the details of changes since 3.0.9.

For the 3 OS X patches so far **NO** `v3.1.0` tag has been created so I just used the file from the master branch.

```ruby
  def patches
    %W[
      http://gitweb.samba.org/?p=rsync-patches.git;a=blob_plain;f=fileflags.diff;hb=refs/heads/master
      http://gitweb.samba.org/?p=rsync-patches.git;a=blob_plain;f=crtimes.diff;hb=refs/heads/master
      http://gitweb.samba.org/?p=rsync-patches.git;a=blob_plain;f=hfs-compression.diff;hb=refs/heads/master
    ]
  end
```

Build successful on OS X 10.7.5.