Bug 527718 - Update WB downloads page at project site

- Add 4.8 to list of update sites
+ use oxygen infocenter 
+ assume that any Eclipse is above 3.4 in the text 


Change-Id: Icb10974de55581a60fe63c8d045980d1f118ff13
Signed-off-by: mgolubev <golubev@montages.com>