Update POMs to point to mirror of the cppwrap plugin

This removes the dependency on maven.imagej.net, which has been causing
problems for Travis and Jenkins.
Merge pull request #855 from melissalinkert/cppwrap-mirror

Update POMs to point to mirror of the cppwrap plugin
Merge pull request #862 from snoopycrimecop/rebased/dev_5_0/allow-failures

Permit cppwrap failure (rebased onto dev_5_0)
Merge pull request #863 from sbesson/release_cleanup

Remove docs/release section from the Bio-Formats repository
Update auto-generated documentation

Repository: openmicroscopy/bioformats
Already up-to-date.

Generated by BIOFORMATS-5.0-autogen-docs#139 (http://ci.openmicroscopy.org/job/BIOFORMATS-5.0-autogen-docs/139/)