Added Sentiment Analysis Graph Property Worker

(Sentiment Analysis is from Stanford's CoreNLP library)
Changed pom files & lumify.properties file.
Added a default frames per second to extract

(For method calculateFramesPerSecondToExtract)
Added README.md
Rearranged Ontology properties
Added null checks for imageFile and metadata
Added DimensionsExtractor class
Changed readme
Added imageWidth and imageHeight
Removed yAxisFlipNeeded and cwRotationNeeded from lumify.properties
Using metadata from Ontology.java file
Added width and height properties for videos
Added space to debug message
Added width, height, fileSize, format to lumify.properties file
Added fileSize and format to dev.owl
Added a null check
Implemented fileSize and format properties for videos
Removed debug statements for fileFormat
FileFormatUtil - extract fileFormat
Removed redundant JSONExtractor call.
Added lumify.properties file to README