Merge pull request Xilinx#758 from sonals/doc2018.3

Mark register read/write APIs as deprecated and minor updates to docs

Merge pull request Xilinx#675 from rradjabi/aws-fpga-dir-fixes

Properly set AWS_FPGA_REPO_DIR for F1 builds

Merge pull request Xilinx#466 from rradjabi/aws-2018_2-data-retention

AWS 2018.2 Data Retention

Merge pull request Xilinx#422 from sarab96/2018.2_XDF

Updated XMA code merged from git enterprise