Release 2.0.

Alphabetical separators is now working. Made it a preference so you can still disable it.

Fixed a couple of bugs as follows:
Fixed groups being shown duplicated when editing contacts. Thanks to acrawl1 for reporting.
Fixed FC bug when adding contacts, and green dial button not dialing in call log. Self-introduced bug :X. Thanks adair for reporting.
A few other layout tweaks, and some minor code changes. Eg. Green dial button was shown when adding contacts, fixed it already.