Fix hard-coded link in documentation
Updates for ImageJ docs &version history
Remove bioformats_package.jar from the bftools.files

This should fix the two JARs zipped in bftools.zip
Tidying conf.py
merge dev_5_0 -D org -I include -E exclude: PR 920 (Fix hard-coded link in documentation)
merge dev_5_0 -D org -I include -E exclude: PR 921 (Final BF doc updates for 5 release)
merge dev_5_0 -D org -I include -E exclude: PR 922 (Remove bioformats_package.jar from the bftools.files)