Resolve passing NA argument to curl when default device is missing (fallback = 0 case).
Merge pull request #2 from mikebirdgeneau/improvefiletesting

Resolve passing NA argument to curl when default device is missing
Past first list element to fromJSON to avoid fromJSON error. (error in evaluating the argument 'content')
Added multiple tests for posting files with various recipient combinations.
Update testing to include variables for recipients and e-mail.
Merge pull request #4 from mikebirdgeneau/improvefiletesting

Add additional file tests
Update sprintf arguments to match order used in Pushbullet API documentation and for consistency with above (note, link, address).

Note additional %s placeholder that was missing.
Merge pull request #6 from mikebirdgeneau/FileArguments-5

Update sprintf arguments
Merge pull request #17 from mikebirdgeneau/master

Add additional file tests, fix file arguments.