Initial cut of the flow guide.
fix broken link.
actually fix link.
try fixing again.
figure out the linking later.
finally fix the link.
documentation fixes.
microsec -> microseconds.
more documentation fixes.
capitalization.
address review comments.  Renaming a lot of things and adding more
details to readme.
add unit tests and clean up code a little bit to re-use names
instead of using strings everywhere.
remove iml file.
update code in readme. Wish there was a way to reference.
fix a bullet point that should not be a bullet point.
add missing license headers.
Merge pull request #2 from cdap-guides/feature/initial-cut

Feature/initial cut