Fix minor styling bug on border of outgoing messages.
Succinct 2.2 includes several bugfixes and new features since 1.0.

Changes since 2.1:
- Bug fix: Messages sometimes out of order in Colloquy 2.4.
- Bug fix: Messages sometimes misaligned in Colloquy 2.4.
- Add a toggle to turn on/off inline display of images.

Changes since 1.0:
- Bug fix: Make default Succinct font size relative to Colloquy default font
  size of 16px
- Bug fix: Make default Succinct font family override Colloquy default font
  family of Times
- Bug fix: Timestamp doesn't respect system-wide time format
- Bug fix: 12-hour time format has leading zero for AM times
- Improved flexibility of style customization
- Allow nickname background color to be changed
- Now uses HTML5 elements -- like anyone cares ;-)