ember-test: toggle between showing and editing states

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: accept edits to todos

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: allow deletion of todos

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: add child routes

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: filter by incomplete todos

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: shwo only complete todos

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: add transition back to all todos

Signed-off-by: George Shore <george@georgeshore.com>
ember-test: remove all competed todos

Signed-off-by: George Shore <george@georgeshore.com>