[code-reflection] Integrated: Hat initial implementation and build infrastructure

[Gary Frost]

This is the initial code upload for HAT project. 

Mainly interested in getting the build system (cmake) and the intellij projects working as sub dir under Babylon

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Commit messages:
 - tabs in ptx markdown
 - cr in markdown
 - whitspace in markdown
 - whitepace removal
 - code format only
 - intellij project files relative to babylon
 - Initial HAT implementation

Changes: https://git.openjdk.org/babylon/pull/83/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=83&range=00
  Stats: 100339 lines in 200 files changed: 100339 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/83.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/83/head:pull/83

PR: https://git.openjdk.org/babylon/pull/83