Fix: Don't save scraped Rating/Votes/Runtime when scraped value is "0" (default value of TMDB=Nothing)

Fix: If there are multiple runtimes on IMDB site, a wrong runtime was created and saved in Ember
Fix: Better fix for Runtime IMDB scraping...
Merge pull request #108 from Cocotus/master

Fix: Don't save scraped Rating/Votes/Runtime when scraped value is "0" (...