Merge changes I1acef9fc,I53ddb3cd

* changes:
  Make top level albums can be loaded concurrently.
  Add log to debug loading time.
tree: dd239b7218e873c3f1607316c5afc84ab77e6d5f
  1. gallerycommon/
  2. src/
  3. src_pd/
  4. tests/