Version 5.1.0

5.0.0 release

Merge remote-tracking branch 'origin/master'

Support for the dontCacheBustUrlsMatching option in the CLI. (GoogleC…

…hromeLabs#218)

Downgrade several dependencies for node v0.1x compatibility (GoogleCh…

…romeLabs#201)

* Downgrade pretty-bytes to ^3.0.1

* Downgrade gulp-eslint for the same reason

* Restoring the eslint dependencies to their earlier versions

Update devDependencies/dependencies (GoogleChromeLabs#199)

* Update devDependencies/dependencies

* Bump sw-precache's version to 4.2.0

4.0.0!