Add information on information exclusivity.
Add explanation about unintentional sharing.
Merge branch 'security-in-dvcs' into 'master'

Security in dvcs

Explain why access & sharing are the same.

See merge request !1097
CI setup docs

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Mention build script
Merge branch 'ci-setup-doc' into 'master'

CI setup doc

I want do describe what CI services we use

See merge request !1099