Refactor a lot of paths to re-organize structure

[JackUrb]

As noted in #285, updating the paths. The goal here is to better follow the overall architecture design document. Most extra lines come from newly committed lock files. We're moving to this format so that the system as a whole is more understandable as we look to finalize components of the design. Nothing has been deleted in this PR, just moved, so all existing code should still work. If you're running on this tag though and see warnings, that means you'll need to make some changes before updating to v0.3.

How to switch over?

If you're reading this, it's likely because you're about to do a bunch of find replaces in order to ensure that your code is now up to the new structure. Following this list of find-replaces will likely help. Here's a list of the changes, in order of likely relevance:

• mephisto.core.local_database is now mephisto.abstractions.databases.local_database
• mephisto.core.data_browser is now mephisto.tools.data_browser
• the rest of mephisto.core. is now at mephisto.operations.
• mephisto.utils.scripts is now mephisto.tools.scripts
• mephisto.data_model.database is now mephisto.abstractions.database
• mephisto.server.blueprints. is now mephisto.abstractions.blueprints.
• mephisto.server.architects. is now mephisto.abstractions.architects.
• mephisto.providers. is now mephisto.abstractions.providers.
• mephisto.data_model.assignment.Unit has been broken out into mephisto.data_model.unit
• mephisto.data_model.task.TaskRun has been broken out into mephisto.data_model.task_run
• mephisto.data_model.assignment_state is now mephisto.data_model.constants.assignment_state
• mephisto.server.channels.channel is now mephisto.abstractions.channel
• mephisto.server.channels.websocket_channel is now mephisto.abstractions.architects.channels.websocket_channel
• mephisto.data_model.architect is now mephisto.abstractions.architect
• mephisto.data_model.crowd_provider is now mephisto.abstractions.crowd_provider
• mephisto.data_model.blueprint is now mephisto.abstractions.blueprint

TODO

• move the files
• run the tests before updating callsites
• run the tests after updating callsites
• document how to transition
• rebase on master

[codecov-io]

Codecov Report

Merging #295 into master will increase coverage by 0.52%.
The diff coverage is 62.60%.

@@            Coverage Diff             @@
##           master     #295      +/-   ##
==========================================
+ Coverage   66.48%   67.00%   +0.52%     
==========================================
  Files          74       74              
  Lines        6611     6526      -85     
==========================================
- Hits         4395     4373      -22     
+ Misses       2216     2153      -63     

Impacted Files	Coverage Δ
mephisto/data_model/constants/__init__.py	100.00% <ø> (ø)
mephisto/data_model/project.py	57.69% <0.00%> (ø)
...ephisto/abstractions/providers/mturk/mturk_unit.py	18.51% <18.51%> (ø)
...blueprints/parlai_chat/parlai_chat_task_builder.py	18.86% <18.86%> (ø)
...phisto/abstractions/providers/mturk/mturk_utils.py	20.14% <20.14%> (ø)
.../blueprints/parlai_chat/parlai_chat_agent_state.py	25.75% <25.75%> (ø)
...histo/abstractions/providers/mturk/mturk_worker.py	28.57% <28.57%> (ø)
mephisto/data_model/agent.py	68.14% <28.57%> (-0.26%)	⬇️
...eprints/abstract/static_task/static_agent_state.py	30.00% <30.00%> (ø)
.../blueprints/parlai_chat/parlai_chat_task_runner.py	30.70% <30.70%> (ø)
... and 119 more

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[pringshia]

Looks good to me, glad we have tests for situations like this!
Unfortunately we will lose our git history / git blameability with a lot of files (unsure if git mv would've preserved).