[Ironruby-core] IronRuby on Mono update

[Sanghyeon Seo]

I updated instructions and patches here:
http://sparcs.kaist.ac.kr/~tinuviel/download/IronRuby/

So, the current summary is:
1. Build Mono from SVN (tested r88240)
2. Checkout IronRuby from SVN (tested r50)
3. Apply patch-mono (which fixes Rakefile and includes DLR changes
shared with FePy)
4. rake compile mono=1

You don't need NAnt anymore.

-- 
Seo Sanghyeon