Update Nimrod to 0.10.0

Update **Nimrod**, **Jester** and **Nawak** to their latest versions.
- Nawak incorporated its stdlib changes upstream, and is now using and dependent on the nimble package manager and the nim-zmq and nim-uuid package. It was also made compatible with the latest Nim/Nimrod.
- Jester is using its new async (unfortunately there is no scgi support for now).

N.B.: Nimrod the programming language is being renamed Nim when the official 0.10 comes out.
I did too, until I was patching some code and it suddenly starting being used :-P I'll open an issue about missing documentation. In the meantime, adding the file to nawak would be useful to ensure we can count LOC for all the frameworks. We're not using these LOC numbers, but it's nice to include them in the hopes they are used in the future