pluginHelpers : new api to start/stop plugins
serverHelpers.createApplicationServer : update to use pluginHelpers
serverHelpers.stopApplicationServer : new
serverHelpers.reloadApps, loadPlugins, exitHandler : removed
actions.restart : preferred method to restart
actions.exit : preferred method to exit
SIGINT now refers to actions.exit
Merge remote-tracking branch 'upstream/master' into reloadable

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into install-from-disk

Conflicts:
	cozy-light.js
Merge branch 'install-from-disk' into reloadable

Conflicts:
	cozy-light.js
Merge branch 'install-from-disk' into reloadable

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into reloadable

Conflicts:
	cozy-light.js
Merge remote-tracking branch 'upstream/master' into reloadable

Conflicts:
	cozy-light.js
lint
add nodeHelpers.clearCloseServer
ensure server is nulled on actions.stop
ensure proxy is close and nulled on actions.stop
reset initial apps port on actions.stop
lint
fix eslintrc file
fix eslintrc file
improve log messages
fixed program start description
code review
code review
fix undefined variable
fix doc
update