* Create new ExtractMediaMetadata processor using Apache Tika Detector and Parser.
* Refactored nifi-image-bundle, nifi-image-nar, and nifi-image-processors to nifi-media-bundle, nifi-media-nar, and nifi-media-processors to reflect broader media related purpose.
* Preserved existing ExtractImageMetadata and ResizeImage processors as well as existing ImageViewerController components to prevent impact on existing uses.
* Resolved collision between ExtractImage and ExtractMedia processors due to common dependency on Noakes' Metadata Extractor project.
- Updated bundle's Tika dependency from 1.7 to 1.8 and Drew Noakes' Metadata Extractor from 2.7.2 to 2.8.0.
- Adjusted ExtractImageMetadata tests for enhanced attribute names in new Noakes' Metadata Extractor version.
* Fix assembly POM to remove duplicate reference to site-to-site nar and change nifi-image-nar reference to nifi-media-nar.
* Note the potential attribute changes on upgrade due to underlying libraries.
This closes#556.
Joe Skora