Mark notification read if at path. Fixes #443
Throw out identical submissions.

Fixes #486
Merge pull request #489 from kytrinyx/orbital-bombreadment

Mark notification read if at path. Fixes #443
Merge pull request #488 from Dparker1990/reject-duplicate-submission

Throw out identical submissions.
Improve nodejs installation help on js dashboard

Provide link to multiplatform package installation instructions
on nodejs project wiki.
Merge pull request #490 from chrisdambrosio/node_install_instructions

Improve nodejs installation help on js dashboard
Fix failing api test
Attempt to add a first pass at a "Gallery" for #466
Add a wrapper for pending submissions

The workload will vary from person to person.
Implement breakdown of exercises in a language

This will allow us to improve the navigation.
Improve seed data
Tweak seed data
Expand workload + breakdown logic
Allow users to mute a given submission until there is further activity.
Accidentally merged in a deleted method.
Add json_expressions testing gem to simplify testing of complex json
Get submission details API
Merge remote-tracking branch 'upstream/master' into submissions_editing_api

Conflicts:
	Gemfile
	lib/app.rb
Fix indention - use 2 spaces in view and test
Fix tests and remove nit comments