Implement user activity log widget on my profile page.

Fix SDUX-12
Use user for given activity record not global one.
Implement activity-log show more button.

Resolve SDUX-12
Add CSS fix to activity log dates
Set default number of items in activity log to 5.

Issue SDUX-12
Move directives into superdesk/directives folder.

SDUX-12
Fix docs in profile/resources.

Use number instead of int.