Changes for the 5.0.0-beta2 pages (rebased onto dev_4_4) (rebased onto develop)



This is the same as gh-30 but rebased onto develop.

----



This is the same as gh-29 but rebased onto dev_4_4.

----

This PR 

- backports some changes from #12 (in 5.0.0-beta1) tag to handle new 5.0-specific JARs in BF downloads page
- fix non initialized variable when tag is only present on the snoopycrimecop remote
- remove hard-coded versions from `omero_downloads.html`