Add Akka HTTP server project

[kellyi]

Overview

This PR adds an Akka HTTP server to the repo as a separate project. The server lives in api/src/main/scala/WebServer.scala and it's currently got two endpoints:

• GET :8090/ping which returns pong
• POST :8090/run which accepts a string, prints it to the log, then returns a hard coded heredoc-type string representing the expected output.

I also added two short scripts: build, which runs ./sbt assembly and debugserver which runs ./sbt ~re-start.

The latter watches the file system for changes & recompiles when it sees them and it should shorten the development loop, since we'll no longer have to create a jar file to test each change. However, it currently only works with the WebServer because it expects there to be some sort of Main class in each project -- and we don't currently have one in the summary dir.

One solution to this would be to just put the server in the same dir and the job files be siblings. Since there's only a single file for the server, it wouldn't clutter up the namespace too much.

Connects #48 Connects #50

Testing

• get this branch, then run ./sbt compile
• run ./scripts/debugserver and verify that the server starts
• http POST :8090/run hello=world and verify that you: a) get the hard-coded output back and b) can see {hello: "world"} in the server log
• http :8090/ping and verify that you see a pong
• revise the ping endpoint such that it concludes with complete("hello world"), then save the file. Verify that the project's recompiled and that you can http :8090/ping to see the new output

[kellyi]

We'll need to update the README at some point, but I'm not sure what that point is. I'm happy to make some small changes here if we'd like.

[rajadain]

I made #56 for updating the README. I think we should do it after the dust has settled.

[kellyi]

Going to add a commit to incorporate some of the work on this branch:

https://github.com/WikiWatershed/mmw-geoprocessing/blob/tt%2Bec/collections-api/api/src/main/scala/Router.scala

[kellyi]

Pushed a few new commits which...

• adjust the update and server scripts to specify "project api"
• replace the prior server setup with one that uses HttpApp:
• add a LazyLogging trait to the server:

object WebServer extends HttpApp with App with LazyLogging

• upgrade Revolver from 0.7.2 -> 0.8.0
• squash the routes and server into a single file
• drop unused imports
• adjust /run to serialize a Scala map to JSON for the output

I made #55 to handle updating the build.scala file to build.sbt, as it seems like this will be involved enough to merit more investigation & review

[kellyi]

These changes now also add setup, update, and console scripts with minimal implementations.

[rajadain]

Taking another look.

[kellyi]

Thanks for all your help with this! I squashed everything down to a single commit. Going to double check that everything still works as expected then merge.