Add bash script for updating copyright headers

This script is largely inspired from a Request from Curtis Rueden and should
be called with a positional argument equal to the current year, e.g.
$ bash tools/update_copyright 2015
Split pattern
Add logic to update single year copyrights
Attempt to fix sed issue
Add check for copyright year arguments
Merge pull request #1462 from sbesson/copyright_tools

Add bash script for updating copyright headers
Update auto-generated documentation

Repository: openmicroscopy/bioformats
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Generated by BIOFORMATS-5.1-latest-docs-autogen#220 (http://ci.openmicroscopy.org/job/BIOFORMATS-5.1-latest-docs-autogen/220/)