More info on calendar

New: Show more information of grabbed and failed downloads on calendar
Fixed: Update IMDB ID from trakt when series is refreshed
Move grid below show/hide button so that the button does not move when the grid is shown
Merge pull request #96 from ToBeFrank/develop

Fixed: WebClient issues when downloading a large amoount of data and running under mono
Merge pull request #98 from ToBeFrank/show-hide-fix

Fixed: Moved episode grid below show/hide button