fixed several pep8 issues

  * E122 continuation line missing indentation or outdented
  * E126 continuation line over-indented for hanging indent
  * E128 continuation line under-indented for visual indent
  * E265 block comment should start with '# '

Tested with pep8 version 1.5.6 (2014-04-14).

Change-Id: Iaea72c74d3678061b0ac837eb8fe8c85a883bb4a
Merge "fixed several pep8 issues"