Add context_label and context_title to LTI POST parameters; Add required requirements; add some docker devstack instructions;

Release new version for #31.

updated readme

fixed link

better fix for link

Updating code to look at UserProfile.language_proficiencies; updating tests; iterating version to 1.0.8

asadiqbal08: Updated branch as per suggestions
asadiqbal08: Addressed PR feedback
mattdrayer: Rebased branch, addressed merge conflict

Use django.utils.timezone.now() when determining if the due date of a component has passed to avoid tz-aware/naive datetime comparison bug

Toggle aria-hidden attribute on modal window open/close; Set title attribute on iframe to display name of component; Remove aria-labelledby attribute from modal body; Make modal overlay id attribute unique'