Bump to latest pom-scijava

Increased pom-scijava version to 3.0

This was a breaking pom-scijava, which removed the SCIFIO versions. Thus we
must now declare a pom-scifio scope=import dependency.
Update component versions

Bumped to the latest component versions:

* imagej-legacy > 0.7.0
* imagej-plugins-commands > 0.2.4
* imagej-ui-swing > 0.5.1

New component:

* imagej-matlab 0.1.0