message: Update __init__.py
  Refactor comment
diff: @@ -30,18 +30,18 @@ tf.merge_summary -> tf.summary.merge
  tf.merge_all_summaries -> tf.summary.merge_all
  -We think this is a cleaner API and will improve long-term discoverability and
  -clarity of the TensorFlow API. However, we also took the opportunity to make an
  +We think this API is cleaner and will improve long-term discoverability and
  +clarity of the TensorFlow API. We however, also took the opportunity to make an
  important change to how summary "tags" work. The "tag" of a summary is the
  string that is associated with the output data, i.e. the key for organizing the
  generated protobufs.
  -Previously, the tag was allowed to be any unique string, and had no relation
  +Previously, the tag was allowed to be any unique string; it had no relation
  to the summary op generating it, and no relation to the TensorFlow name system.
  -This made it very difficult to write re-usable code that would add summary
  -ops to the graph. If you had a function that would add summary ops, you would
  -need to manually pass in a name scope to that function to create deduplicated
  -tags, otherwise your program would fail with a runtime error due to tag
  +This behavior greatly complicates the reusability of the code that would add
  +summary ops to the graph. If you had a function to add summary ops, you would
  +need to pass in a namescope, manually, to that function to create deduplicated
  +tags. Otherwise your program would fail with a runtime error due to tag
  collision.
  The new summary APIs under tf.summary throw away the "tag" as an independent
  