Restrict pages to roles

Choose, which page should be accessible by secretary or doctor only.

There will be only two roles:

• secretary
• nurse - will have the same set of pages, except of adding new subjects

changed time estimate to 2d

mentioned in commit 8088d783

mentioned in commit 6ca347b1

mentioned in commit 0d7939d8

mentioned in commit 7f20ff18

mentioned in commit ebd66f50

mentioned in commit 93fd5170

added Doing label

assigned to @carlos.vega

changed milestone to %0.13.0

mentioned in merge request !192 (merged)

closed via merge request !192 (merged)

mentioned in commit ce5093ff

mentioned in issue #251 (closed)