Implement reference version of Coherence Enhancing Diffusion.
5 time speed improvement on a quad-core.
Some more tweaking, about 6 time speed improvement on a quad-core (15% of original time).
Upgrade dependencies to latest releases.
Additional parallel optimizations using Futures.
Move `progress` classes to more appropriate package.
Simplify use of ProgressReporter.
Graduate CED filter to ijp-toolkit2.
For a moment use Scala 2.10.3.
Upgrade to Scala 2.10.4 and use Java 6 target.

Java 6 is used to be nice to Fiji, since it still runs Java 6
Correct comment formatting.
Use final release of Scala 2.11.0.
Add helper method for easy running of CED.
Update SBT URL.
Minor simplifications.
Improve scaladocs.
Use Scala convention for accessors.