Better support for mobile devices

[mcandre]

I'd totally use F# to write cross-compatible apps, but there's very little in the form of free, open source support for developing apps on multiple platforms. Most of the current solutions involve either paid development environments or F#-to-JavaScript compilation. A more direct build process would help immensely.

[funnelweb]

largely a duplicate of #33

[mcandre]

No, MonoTouch is nonfree, which is exactly the problem I pointed out.