index.txt: Correct typos on landing page.

Conflicts:
	omero/index.txt
Merge pull request #465 from bpindelski/rebased/develop/typos

index.txt: Correct typos on landing page.
Unify command to set web server.
Corrections to TIFF supporters urls
Adding capital V
Merge pull request #467 from hflynn/tiffstuff

Corrections to TIFF supporters urls
Merge pull request #466 from jburel/install-web-develop

Unify command to set web server.