Wrapping-up download refactorisation

This commit is making required adaptations mainly in BuildGuide
and removing deprecated old version of download scripts.

Change-Id: I6421b55d116831dc3b47c7630e91d361d56414c8
Issue-ID: OOM-1803
Signed-off-by: Michal Ptacek <m.ptacek@partner.samsung.com>
12 files changed