fix share images for special script
add latvian to languages we support
Merge pull request #696 from code-dot-org/levelbuilder

levelbuilder changes
Fix 404
Merge pull request #697 from code-dot-org/404fix

Fix 404
change sharing urls again since they were broken
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
tests
Merge pull request #699 from code-dot-org/staging

update levelbuilder