Correct use of asterisk in docs.
Updated ITK build instructions

Changed the ITK build and usage instructions to reflect that a SCIFIO
ImageIO plugin can now be automatically fetched by the latest ITK
builds.
merge dev_4_4 -D org -I include -E exclude: PR 545 (Adding OME 5 product menu)
merge dev_4_4 -D org -I include -E exclude: PR 549 (Zeiss LSM: use the longer display channel name)
merge dev_4_4 -D org -I include -E exclude: PR 552 (Correct use of asterisk in docs. (rebased onto dev_4_4))
merge dev_4_4 -D org -I include -E exclude: PR 554 (Updated ITK build instructions (rebased on dev_4_4))