Broccolify

Things needed:

 - [x] Replace `VERSION_STRING_PLACEHOLDER` with the generated version.
 - [x] Add license info to output.
 - [x] Wrap generated files in an IIFE.
 - [x] Require all package names in compiled output (to ensure global names are exported properly).
 - [x] Manually compare generated assets
 - [ ] Ensure asset publishing works properly.
 - [x] Precompile Handlebars Templates

Travis Builds/Scenarios needed:

 - [x] MULTI_BRANCH_TESTS=false TEST_SUITE=packages
 - [x] MULTI_BRANCH_TESTS=false TEST_SUITE=old_jquery
 - [x] MULTI_BRANCH_TESTS=false TEST_SUITE=extend_prototypes
 - [x] MULTI_BRANCH_TESTS=false TEST_SUITE=built