add language declaration and samples for LoomScript

LoomScript is the scripting language for the Loom SDK.
It has an ActionScript3-like syntax with added C#-esque capabilities.

Loom SDK: https://github.com/LoomSDK/LoomSDK

Some GitHub projects using LoomScript:

* https://github.com/bengarney/ScoreKeeper
* https://github.com/Crwth/MultiMovieClip
* https://github.com/dbltnk/ouya-loom-jam
* https://github.com/elevatefun/DragonBonesLoomScript
* https://github.com/esDotDev/RunnerMark-Loom
* https://github.com/ghroot/AshLoom
* https://github.com/johnbatty/WhackAPotato
* https://github.com/lunarraid/LoomIsoProject
* https://github.com/pixeldroid/spec-ls
* https://github.com/ravensinth/LoomSnake
* https://github.com/RivelloMultimediaConsulting/LoomDemos
* https://github.com/southpawfishel/Gestouch-Loom2D
* https://github.com/southpawfishel/LoomTMX
@arfon I appreciate your advice, I'm new to linguist.

I've tried options 1 and 2 without success:

1. there doesn't seem to be any signature token required by all LiveScript files that clearly indicates a given file is LiveScript (on the other hand, no LiveScript file will ever use an enclosing `package {` block..).
2. only reporting a thing we know to be true seems conceptually more appropriate to me, but in my tests, the Bayesian classifier then misclassifies many LiveScript files as LoomScript 

So the binary if / else is the only approach that works correctly in practice.

Is that acceptable? I see that IDL / Prolog does this too. Or is there a Better Way?