In this commit, the references to ReviewDialog

in the codebase were renamed to ReviewComposer.

The exceptions to this are the ReviewDialog references

that have to do with extensions. There were slight

format changes made to the header and footer. The

icon for the ShipIt checkbox was added but there is

some CSS that needs to be added in to make the toggling

between checked/unchecked icons to work. The comments

also still need to be restructured.

I ran the Javascript Unit tests. The 6 test failures are the same as the ones in the master branch so the changes seems to have not broken anything.