Errata updates to v1.3.6 (aws#394)

* Update ERRATA.md

* Update AWS_Shell_Interface_Specification.md

Update ERRATA.md

Release v1.3.6 (aws#386)

v1.3.5 Release (aws#385)

v1.3.4 patch (aws#378)

* Create HOWTO_detect_power_gated_AFI.md

* Update strategy_TIMING.tcl

* Update RTL_Simulating_CL_Designs.md

* Update RELEASE_NOTES.md

* Update README.md

* Update ERRATA.md

* Update FAQs.md

Merge pull request aws#363 from aws/RC_v1_3_3

merge Rc v1 3 3

fix missing link to SDAccel preview page

Release v1.3.1

Releasing 1.3.0

Change-Id: Icee3502f0eb9c584791673fd774131aec1462b1f

Hotfix v1.2.5