Merge pull request #18 from fidian/master

Don't stringify Buffer objects + remove unused vars
Bump version for 0.1.4

- Also, remove 0.8 from supported versions because of gulp-util duplexer
Bump version to 0.1.5

[ci-skip]
Clone file result instead of just getting contents

Closes #19

- Instead of just using "contents" for value, clone the whole file obj
Merge pull request #20 from jgable/cloneFileResult

Clone file result instead of just getting contents
Bump version to 0.1.6 for publish

[ci-ignore]
Bump version 0.1.7

[ci skip]
Fix broken file.contents on subsequent cached runs

- Update default value implementation to check for _contents
- Add some new tests that test the contents
Merge pull request #22 from jgable/fixContents

Fix broken file.contents on subsequent cached runs
Bump version to 0.1.8

[ci skip]