Add ability to browse activity history to profiles

[siobhan]

Currently profiles only show recent activities and there is no way to browse through the history.

Example: ​https://profiles.wordpress.org/aaroncampbell

It's possible to browse through activity history on the old WordPress support profiles: ​http://wordpress.org/support/profile/aaroncampbell

This is useful because it makes the following possible:
1) browse through a contributor's history
2) see a contributor's activity for a specific time period
3) see how a contributor's activity developed and changed over time
4) contributor can demonstrate what s/he was doing during a specific time period
5) find a contributor's first contribution (overall, and for a specific contribution area)

[melchoyce]

+1, would be a good addition to a future profiles redesign.