Pass option to the compiler for targeting specific build process

[nickbalestra]

The following PR will pass an option to the compiler called build.

• when running the cli dev build value is automatically set to development (can be override if needed by passing the flag -P when running the cli)
• when running package or publish build is automatically set to production (and cannot be oveririden)

This will allow for template that support this to avoid complex processes like minifications, in order to offer a faster feedback-loop while developing #components and allow to enable more complex debugging tools like full sourcemaps, or react dev tools.

[matteofigus]

As discussed, I think I prefer something like production=true|false as this is more clear. Same for the cli param that I would document.