Merge pull request #719 from typesafehub/wip/warry-background-run

Background run
Adding and killing background jobs.

The weird things it does are:
- receive an Execution start (that will start a background job)
- when receiving a JobStarted event, it flags the later execution
- when the execution ends, we artificially keep it alive
- until the job ends
Remove the cranky blinking when loading an sag file (or reduce it at least)
Code: remove footer with nothing in it!
Misc updates to run/actor pages
Fix

Conflicts:
	ui/app/assets/plugins/run/actors/actors.html
	ui/app/assets/services/inspect/runPluginHandler.js
	ui/app/assets/services/sbt/tasks.js
	ui/app/assets/widgets/openIn/openIn.js
Small arrangements for the ui
First step towards handling of sbt plugins for background run and Inspect. Uses modal window during the installation process.

tmp

Conflicts:
	ui/app/assets/plugins/run/actors/actors.html
	ui/app/assets/plugins/run/run.js
Change the way we configure echo
add fork in run in generated conf
Automatically add the ui plugin to project
Remove confirmation for creating config files
fix ClientOpened
Fix the echo command in tasks.js