In case you weren't aware I took over maintaining dispatch/reboot at the end of April. I've been working on clearing through the backlog of issues that's built up and my work to that end has resulted in the release of Dispatch v0.13.0.
If you use Dispatch, I highly recommend this upgrade as it'll get you up to a more recent version of AsyncHttpClient that's compatible with Play. There were some API changes in this release that you can read about on the GitHub release page.
I'm still working on building out an improved and updated documentation site for Dispatch. The current one hasn't been updated since v0.11.2, but remains mostly accurate. If you have any questions, feel free to open an issue and I'll be happy to help.