Real time console logging

[nbbaier]

Currently, all console.log events are shown printed after the execution of a val is complete. It would be nice to (at least sometimes) be able to see logs when they occur. This type of logging would also allow us to display progress bars on script vals that might take a while to execute.

I'm sure this would be a big lift, so not that big a priority, just thought I'd add it.

[Xkonti]

This has been implemented! Logs are being streamed in real-time during Val's execution now. To start drawing progress bars the following feature needs to be implemented first though: #64

[stevekrouse]

Shipped!