* refactor(eslint): Added no-unsed-vars, env specific .eslintrc's for buildin & hot
* This change allows for buildin to now be part of the lint test by addition of an extra .eslintrc file which extends existing but sets es6 to false
* Turned on no-unused-vars for eslint, and then removed all warnings from turning that feature on
* Was getting notified of errors in "quote" property in eslintrc, so changed to correct value from error to 2.
* beautify
* swap invalid eslint config val
If the length option on a hash was being used for a file path template
(e.g. '[hash:8].js'), the file would be outputted with the correct name,
but the reference inside require.ensure would not work, because the length
truncation would operate on more than just the hash, and would truncate
some of the characters added to pad the hash value.
Fix is to implement the `hashWithLength` function where this is a problem.
This doesn't feel like a proper solution, as it adds some redundancies
in a few places, but it's only in the chunk loading blocks that this matters,
so it's small in scope.
Generalized identifier cleansing to replace invalid (and unicode)
characters with underscores to ensure a valid function name.
Applied function in other places functions were generated based on
libarary name.