The YDK maintenance release 0.8.6.4

[ygorelik]

I am happy to announce general availability for the YDK maintenance release 0.8.6.4.

The following changes were introduced since release 0.8.6.3.

New features and enhancements:

• install_ydk.sh: Installation of Python and Go YDK packages should not require root access (#1069)
• Expanded unit test cases to retrieve list elements

Resolved GitHub issues:

• CodecService fails to decode XML in python when referencing namespace prefix (#1071)
• CiscoDevNet YDK C++ README needs Documentation & Support links updated (#1077)
• Error in ydk-gen-master/test/dependencies_centos.sh version check (#1078)
• The 'not_eq' is a C++ keyword (#1080)
• The libyang issue with arguments that are swapped (#1081)

Resolved non-GitHub issues:

• Fixed and tested C++ sample apps