fix link to ICS Opener plugin
Merge pull request #714 from mtbc/ics-opener-link

fix the ICS Opener plugin link
merge dev_4_4 -D org -I include -E exclude: PR 673 (Make configuration file suffix configurable)
merge dev_4_4 -D org -I include -E exclude: PR 707 (Metamorph image names)
merge dev_4_4 -D org -I include -E exclude: PR 710 (Data test updates (rebased onto dev_4_4))
merge dev_4_4 -D org -I include -E exclude: PR 711 (ImageConverter: fix dimensions of the last tile)