ANN: 0.5.0-rc3 now available

[Viral Shah]

Quoting Tony's earlier message:

Release candidate 3 is now available:

https://s3.amazonaws.com/julialang/bin/linux/x64/0.5/julia-0.5.0-rc3-linux-x86_64.tar.gz 
https://s3.amazonaws.com/julialang/bin/linux/x86/0.5/julia-0.5.0-rc3-linux-i686.tar.gz 
https://s3.amazonaws.com/julialang/bin/osx/x64/0.5/julia-0.5.0-rc3-osx10.7+.dmg 
https://s3.amazonaws.com/julialang/bin/winnt/x64/0.5/julia-0.5.0-rc3-win64.exe 
https://s3.amazonaws.com/julialang/bin/winnt/x86/0.5/julia-0.5.0-rc3-win32.exe 
https://s3.amazonaws.com/julialang/bin/checksums/julia-0.5.0-rc3.sha256 
https://s3.amazonaws.com/julialang/bin/checksums/julia-0.5.0-rc3.md5

This has backported the addition of proxy support for the package manager via libcurl on Linux and Mac (libgit2 should support proxies fine on Windows without needing libcurl). Please test and report any issues. There are some open pull requests fixing issues involving precompilation that we will likely want to make a release candidate 4 with towards the end of the week or early next week, but if nothing else major comes up, that could be our last RC before tagging 0.5.0 final.