Tidying suggested by Mark
Removing out-of-date ref to tar.bz2 files
Tidying Windows installation page while I'm at it
ICE -> Ice
Missed one! ICE -> Ice
Modify the root of the main OME CI server to use ci.openmicroscopy.org
Merge pull request #607 from hflynn/glencoe_link

Removing link to out-of-date Ice binaries at Glencoe
Deleting contributing docs on 4.4
merge dev_4_4 -D org -I include -E exclude: PR 609 (Modify the root of the main OME CI server to use ci.openmicroscopy.org)
merge dev_4_4 -D org -I include -E exclude: PR 610 (Deleting contributing docs on 4.4)