Python 2.7 fixes
Merge pull request #1 from rail/eb

Python 2.7 fixes
Server returns blob URL to client.
Set filename in response headers too.
Strong refactoring after review.
Add docstrings for all functions/helper functions.
Merge pull request #2 from catlee/staging

Staging
Tune server to accept .zip and .etl files - bug 913244
Bump file size limit
Merge pull request #3 from rail/bump_max

Bump file size limit