Provides `Task` to launch ceylon `compile`, `compile-js`, `doc`, `run`, `run-js` command line tools
### Compile
Tasks to compile to both jvm and javascript backend are available.
They support various options.
A simple task to compile to jvm backend:
```ceylon
Task compileTask = compile {
modules = "my.module";
};
```
A simple task to compile to javascript backend:
```ceylon
Task compileJsTask = compileJs {
modules = "my.module";
};
```
Several modules can be compile at ...
