am e9cca7ea: am 9fbc8f70: am edf2ab16: am b345693f: am 5a9c5b67: am b02d529a: am 6859939f: am 99a79e80: Doc change: add policy guidelines documents.

* commit 'e9cca7eae8354ff012c3ef87923a8435788547df':
  Doc change: add policy guidelines documents.