Dsteele/buffer support

[dills122]

Added support for Buffer's as an input type.

New Input Type BufferObject

interface BufferObject {
  ext?: string, // mime type of buffered file
  data: Buffer,
  name?: string // file name for buffered file
}

This will allow for more flexibility in user's inputs.

Additional Upgrades

Another "upgrade" was to switch the test runner over to mocha.

The reasoning behind this was due to some weird intermittent test failures during development that could not be traced back to a bug. Two of the test cases that were popping up a-lot were Should hash remote image and Should handle custom request object and once I migrated the test runner over to mocha I noticed these failures to cease.

[danm]

Thank you!