Precompile scripts

[bilou84]

This PR improves exports of games in a couples ways:

• First, we now export pre compiled scripts rather than doing it on every game start at runtime. We also minify the result of the compilation. The means at runtime we have less files (and an overall smaller script to load) and we don't have the compilation which significantely increase the loading time.
• Thanks to that first point, we don't need the SupCore.js (0.6MB) bundle and the various typescriptAPI.js bundles anymore. I also took the opportunity to minify the SupEngine.js bundle as it was the largest file remaining (from 1MB to 0.5MB). Those point significantely reduces the size of the build.

After testing it on a couple games, I average about 5MB less on the build size which is quite good!
I didn't run the numbers myself on the loading times, but spencer gave it a try and the results are quite nice as well! https://twitter.com/StuffBySpencer/status/815027274319859712

There is one downside though. We are breaking the compatibility with third party plugins.
There is two small things to change when exposing some scripts API (which is the most common thing plugins do of course...):

• The way we expose the actor component for the API must be done with one single property. See master...precompile-scripts#diff-4f25b475a81494b567aa45d690bfbba0R13
• We need to expose the actor component class name at runtime. See master...precompile-scripts#diff-43e494488baf321ef7b9ff46d9b5b681R1

It would be nice if we could get in touch with developpers to update their plugins before we release the next version. Since it's very easy to fix, hopefully we can get everyeone!

[kyxap]

Small code style upd requested ;)

[kyxap]

Empty line at the end off the file is missed.

[kyxap]

// All Is not clear comment :)