add tslint to the dist and travis builds, with a really simple config

[trevj]

Some end-of-week therapeutic build love...

Been playing around with tslint on a personal project. It's got some - IMO - glaring omissions, e.g. specifying an indent level (palantir/tslint#581), but many of the things are useful and it seems to be the only linting game in the TypeScript town.

This starts off small:

• enforce single quotes throughout
• add a lint build target, as part of the dist target
• have Travis fail if lint fails (so it's effectively a presubmit)

[jpevarnek]

Awesome work! Glad to see this getting in and looking forward to when we add a few more rules (and get it into the uProxy repo)

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Reviewed 33 of 33 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved, some commit checks failed.

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Comments from the review on Reviewable.io

[jpevarnek]

Have an explicit 👍!