Preparation for release 2.0

[clementval]

Status

IN DEVELOPMENT

Description

• array-transform directive as been renamed expand as specified in v2.0 of
  the CLAW Directive Language Specification.
• parallel clause for expand directive is implemented.
• update clause for expand directive is implemented.
• beta serialization support for expand and sca elemental directives.
• SCA: support for transformation in ELEMENTAL function/subroutine for
  GPU target
• low-level: block directive like loop-hoist can now be nested on the same
  depth.
• driver: _CRAYFTN macro is passed directly when Cray preprocessor is used.
• array-transform directive as been renamed expand as specified in v2.0 of
  the CLAW Directive Language Specification.
• parallel clause for expand directive is implemented.
• OMNI Compiler submodule now pointing to
  omni-compiler/xcodeml-tools@772cf79
• Java 1.8 or newer is now required for CX2T.