ImgLib2-ij is versioned independently of ImgLib2 now

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Temporarily switch to explicit ImgLib2 version

ImgLib2 beta 26 introduces API breaking changes; therefore we need to
switch to a newer version explicitly, without relying on pom-scijava
to list the proper version.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump to pom-scijava 1.157

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>
Bump to pom-scijava 1.158

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>
Bump to pom-scijava 1.160

Signed-off-by: Jenkins <jenkins@dev.loci.wisc.edu>
POM: pin to pom-scijava 1.161

This updates to scijava-common 2.15.0, which includes many
new services migrated from the ij-core component of imagej.git.
Switch to SJC IOService
Switch to SJC TextService
Switch to SJC ConsoleService
Standardize javadoc of AWT replacement classes
Migrate to SJC version of utility classes

See:
https://github.com/scijava/scijava-common/commit/93ceb0c0562eb8a805c40944c2773d702166727e
Migrate to SJC version of core services & plugins

See:
https://github.com/scijava/scijava-common/commit/3aa51f812fef19cd14e3adea4d4aa5e3b395f1ea
ImageJ: remove inherited service accessors
Migrate to SJC version of recent file service

See:
https://github.com/scijava/scijava-common/commit/8e023f7b397c1df63c7238935df7f2880729913e
Remove module and script framework icons

They have migrated to SciJava Common:
https://github.com/scijava/scijava-common/commit/ec02169e37a0366101607a83ee306485b13bdfe2
Use SciJava Common tests JAR

The TestUtils migrated from ImageJ core to SciJava Common:
https://github.com/scijava/scijava-common/commit/3aa51f812fef19cd14e3adea4d4aa5e3b395f1ea
Migrate to ImageJ Common component

See:
https://github.com/imagej/imagej-common
Clean up dependencies
Add Daniel Seebacher's DimSelectionWidget

Migrated from the ImageJ OPS project:
https://github.com/imagej/imagej-ops/tree/ij-ops-0.1.0/src/main/java/imagej/ops/widgets
Update to ImageJ OPS 0.2.0