Version 0.6.11

- Deleted jQuery simpledialog plugin as it was not used
- Added a timeline to the time sorting view (otherwise it's hard to know
when the timeline ends and there are no more notes on the left)
- Raised the minimum speed of notes
- #27 [+] and [-]
- #40, #30 & #38  Fit in window
- #43, #8 Toggle the navigation tools and knowledge type colors on/off
- #44 It's possible to set Main idea field required.
- Centering button is used for the Fit in window function
- Fixed a few notices and warnings that appeared in debug mode.
- Improved the Knowledge Building settings page, added setting for Main
idea field (required/optional)
- Form field validation for the thread view form
- Unspecified notes (notes that were written when the post didn't have
KnBu enabled) don't show up anymore as unreadable black boxes but normal
white notes.