Added "Autopoke.user.js"

- Checks for new pokes to respond to every 5 seconds.
- Creates a Log under the "Pokes" pannel of the page.
Removed unnecessary console.log
Improved Autopoke.user.js

- Changed the location where we get the correspondant's name : it's now
more stable, doesn't need a timeout and we get the last name.
Added the "Autopoke button" to Autopoke.user.js

- Added an "Autopoke button" to start/stop autopoking.
- Refactored the code
- Added a max-height and a scrollbar to the "Autopoke log".
Improved style of the log

- Copied the Facebook style using its classes.
- Added a fixed height with auto-appearing scrollbar.
- The Scrollbar is always at the bottom of the log.
Merge branch 'master' of https://github.com/SeevenDev/UserScripts