Merge pull request #774 from code-dot-org/test

DTP
Merge pull request #773 from code-dot-org/staging

DTT
Merge pull request #775 from code-dot-org/staging

Remove X-Frame-Options
Merge pull request #776 from code-dot-org/test

DTP
Merge pull request #778 from code-dot-org/staging

DTT
Merge pull request #779 from code-dot-org/test

DTP
Merge pull request #780 from code-dot-org/staging

DTT
Merge pull request #781 from code-dot-org/staging

DTT
Merge pull request #782 from code-dot-org/staging

link to gallery from homepage (static iamges)
Merge pull request #783 from code-dot-org/test

DTP
disable trophies
disable more trophies
Temporarily send en-US users to static frozen from code.org/learn.
Merge pull request #785 from code-dot-org/planbfrozen

Temporarily send en-US users to static frozen from code.org/learn.
Code.org homepage link to frozen goes to static version too.
make studio.code.org frozen also point to static frozen.
Merge pull request #787 from code-dot-org/planbfrozenhomepage

Code.org homepage link to frozen goes to static version too.