create user rest controller

tasx-20
implement user rest index and show actions

tasx-20
unit test user rest controller index and show actions

tasx-20
return empty JSON object if no such user

tasx-20
rewrite readme with markdown

tasx-24
Merge branch 'feature/tasx-20-user-rest-api' into develop

Conflicts:
	grails-app/controllers/edu/oregonstate/mist/tasx/UserRestController.groovy
Merge pull request #12 from osu-mist/feature/tasx-24-readme

rewrite readme with markdown
Merge branch 'develop' into feature/tasx-6-task-view-controller
remove empty interval controller

tasx-6
add javadoc comments to task controller

tasx-6
un-align assignment statements

tasx-6
add task description summary method

tasx-6
add comment explaining Interval doSetAt and doGetAt methods

tasx-6
replace null comparison with negation

tasx-6
replace closure with taglib in task view

tasx-6
refactor task list taglib with css styling

tasx-6
use taglib for task details status

tasx-6
simplify task details view model

tasx-6
define task status strings in domain class

tasx-6
move task controller logic to service class

tasx-6