feat(compiler): allow recursive components
fix(application): also bind the root component to the injector
fix(core): export ViewPort in the public exports
fix(build): analyze examples and benchmarks again
fix(benchmarks): use explicit `main()` function and do not reexport

Otherwise `pub` would not pick it up e.g. for `dart2js`.
fix(benchmarks_external): use angular dart transformer
feat(benchmarks): initial version of tree benchmark

Closes #269