Added form object for adding an "empty" field.
Cleaned up template for mission page, preserved footer in process and simplified styling.
Adding wiki title tag
Merge pull request #736 from dylanjbarth/preserve_footer

Cleaned up template for mission page, preserved footer in process and si...
Merge branch 'master' of github.com:learningequality/ka-lite into release-central
Adding default text for other selection fields.
Merge pull request #27 from wangguan59/empty_selection

Empty selection
Add required fron-end attributes.
Merge pull request #28 from wangguan59/empty_selection

Add required fron-end attributes.
Merge pull request #740 from bcipolli/empty_selection

Replace default selection option
no guarantee metadata exists, so reference this way.
Merge branch 'release-central' of github.com:learningequality/ka-lite into release-0.10
Merge branch 'release-0.10' of github.com:learningequality/ka-lite into release-0.10