Update management command test to fix test failure

Add management command for creating test submissions and assessments

Updating the grading section to display all the remaining steps

There was a leftover TODO that needed to be fleshed out around the grading status. This will now list all the remaining steps when going through the assessment process.

Fixing peer assessment for required grading of 1

Fixing a defect where the SQL query for getting a submission for peer assessment fails when the required number of assessments is set to 1. Updated a simple test to validate this as well.

Add in all the UI Workflow Hooks to have the correct front end behavior

Includes a number of JS changes, templates, and handlers to call the workflow api instead of complex, hard-coded logic.

Improve docstrings for Workflow API

Allow export of OpenAssessmentBlock to XML

Removing Font Awesome Assets & Downgrading Syntax

Add name to default self-assessment to fix a key error in studio view

removing Font Awesome library from xblock base Sass/FED assets and downgrading any syntax references to match LMS's version of Font Awesome

TIM-227

Validate assessment start/due dates

Validate assessments are specified in the order: peer, then self.
Update XBlock date fields to use scope.settings and be named "start" / "due"
Add validation to workbench scenario parsing.
Resolve unspecified dates.
Use resolved dates to determine whether problem/submission/assessments are open or closed.

First pass at creating the Peer Workflow appropriately.

Wiring all the peer queue into place

Updating based on rebase to fix tests

Display line breaks for student response, rubric prompt, and feedback

Sylviapearce/documentation/tim 160

Neat-based Sass Import Fix

Check for self-assessment completion

Remove file leftover from rebase

UI tweaks to save response

Log submission errors