Feature - Webpack build changes to support css modules

[tomdye]

Type: feature

The following has been addressed in the PR:

• [x] There is a related issue
• [x] All code matches the style guide
• [x] Unit or Functional tests are included in the PR

Description:

• Adds ability to generate css-module output for projects using the CLI.
• IDE changed spaces to tabs

Resolves: https://github.com/dojo/widgets/issues/224 Supersedes: https://github.com/dojo/cli-build/pull/20

Note: Typed CSS modules are outside the scope of this initial delivery

[codecov-io]

Current coverage is 99.59% (diff: 100%)

No coverage report found for master at 6269ae6.

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