Version 0.8.0

Issues closed by this release here.

Important additions:

Items can be shuffled (in and between blocks) now.
Timed submit buttons allow you to specify a minimum time in which to submit.
Item tables can be imported straight from Google Docs, reducing the edit-download-upload-cycle previously necessary. Makes collaboration easier.
A proper test mode
- you can now create test codes for runs. They're special in that they enable a bar with specific features (auto-filling forms, skipping to the next step in the run/ending a pause).
- you can now share test codes for runs before releasing the run to the public
- test codes have names like zanyElephant, which allow you to find them again if you're looking for a specific test case
the first semblance of an OAuth2.0 API (manual activation needed)
users can turn off emails from your study for a week or forever if you allow them to.