Some examples have been failing to load in some browsers, and this
ensures that whenever the promise to load Rust code fails we log any
errors happening instead of accidentally failing silently.
This helped debug a bit in #897
* Changed eslintrc to be JSON file (Most projects use JSON version)
* Added .eslintignore to ingore node_modules from subdirectories such as examples
* Ran eslint --fix examples to fix all examples
* Added npm script for running eslint against examples
* Added npm script for running eslint against generated *out* code
* Hooked npm scripts into travis ci to prevent examples from becoming inconsistent with future PR's
Right now Webpack probably has the most mature support for loading wasm modules,
so let's show off how to do that! Additionally this commits hello world as an
example to the repository.
