Use the new build env on Travis

more ram, more cpu, better boot times, caching built in
Merge pull request #651 from joshk/patch-1

Use the new build env on Travis [resolves #81634774]
Update README.md
Dropbox changes
Merge pull request #837 from code-dot-org/staging

DTT
Don't allow submission of Hour of Code events.
fix to build script from daemon box local change
Merge branch 'staging' of github.com:code-dot-org/code-dot-org into staging
production -> test
Merge branch 'test' into staging
Add 'Function with Parameters' video key
Add 'Function with Parameters' video key
Levelbuilder changes
Merge pull request #845 from code-dot-org/levelbuilder

Levelbuilder changes
Merge pull request #846 from code-dot-org/staging

DTT
eager load should be more eager
Merge pull request #847 from code-dot-org/preload-models

eager load should be more eager
Merge pull request #848 from code-dot-org/staging

DTT
Merge pull request #844 from code-dot-org/test

DTP