Added NSArray -sortWithBlock, -uniq, -indexOf and -partition
I just switched my project to use ObjectiveSugar and I want these too. I also added [NSArray compare:], which is pretty much required in order for sortWithBlock to work rationally. It's easy to implement and just a useful thing to have in general. Hopefully I did everything correctly. :)
If you like these and accept the pull request, I have more things I want to add...
One suggestion - would you consider revamping or getting rid of the examples in the README? It feels hard to maintain and error prone. Maybe something like this instead?
https://github.com/zdavison/NSString-Ruby (see the Method List section)
Just circling back on this one... Suggested improvements? Would this be easier if it were separate pull requests?