Mark temporary css with TODO comment

Sometimes when developing backend stuff there is a need to write some css. We should put those ugly temporary css rules in one consistent place. I propose `application.css` (which shouldn't have any rules, only imports)

Example:

In `app/assets/stylesheets/application.css`

```css

/* TODO - Tymon */
.some .temp .css #foo { width: 100px; } 
.some .other .crap { color: red }
#pretty #awesome #border { border: 1px dashed purple; }