Merge pull request #96 from kpalway/master

Marmoset result detail display
[frontend] Fix some issues when we're cloning a new assignment.
Merge remote-tracking branch 'origin/master'
[frontend] Adjust error message for fetching projects.
Merge pull request #97 from e45lee/master

[frontend] Fix some issues when we're cloning a new assignment.
[frontend] Hide delete dropdown item when we have a standard assignment [A[0-9]+] open.
[frontend] Fix delete assignment issue.
Merge pull request #98 from e45lee/master

Fix precreated assignment deletion.
[backend] Suppress .git directory from showing up in project downloads.
Merge pull request #99 from e45lee/master

[backend] Suppress .git directory from showing up in project downloads.
Merge https://github.com/cs136/seashell