Add Julia benchmark for sudoku_v1

This is a Julia implementation of the sudoku_v1 benchmark. The Julia language has a homepage [here](www.julialang.org) and it's github source code (with information about installing/compiling) is [here](https://github.com/JuliaLang/julia). Timing this implementation on my personal machine consistently returned results of 15s for 10,000 sudokus (same benchmark as the main table of the [blog post](http://attractivechaos.wordpress.com/2013/04/06/performance-of-rust-and-dart-in-sudoku-solving/)). Unfortunately, compiling/installing Julia on Linux is nontrivial currently, but Windows and Mac have pre-compiled binaries. Feel free to message me personally with any questions or concerns.

-Jacob