Merge release-1.1 into master#766

Merged

hklai merged 4 commits intoistio:masterfrom

hklai:1.1-master

Jan 19, 2019

Commits on Jan 15, 2019

assorted doc updates (#757)
rshriram
authored

Commits on Jan 16, 2019

add optional incremental flag to ResponseSink and ResourceSource services (#762)

ayj
authored and
istio-testing
committed
Add option to select worload using lables for authn policy. (#755)

diemtvu
authored and
istio-testing
committed

Commits on Jan 19, 2019

Merge remote-tracking branch 'upstream/release-1.1' into 1.1-master
hklai
committed