Merge pull request #3 from aybbou/master

Update
The function inventorKeywordsAction() is added : retrieves the top 20 (default) keywords of a given inventor
The function getKeywordsInventor() is added : retrieves an inventor's keywords
New route added : handles the trending keywords of an inventor
The most published authour's keywords : Ajax call + Scatter Plot
Enhanced code : fromTitlesToKeywords added
Changes adapted to the controller
Merge pull request #17 from younesherlock/1.2.2

Update 1.2.2