This allows us to use `sourceURL` which otherwise does not work. In the
future we hope to have proper source maps in development mode and
disable this again.
The `sourceURL` directive must be on the same line as the thing it's
referencing. This patch allows it to work again in development mode
because each Javascript file ends up in its own `define(...)` line.
It will strip out any trailing whitespace and put the `sourceURL`
comment on the same line and everything seems to work.
- Refactor source_url to avoid using eval in development
- Precompile handlebars in development
- Include template compilers when running qunit
- Remove unsafe-eval in development CSP
- Include unsafe-eval only for qunit routes in development
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
