tvdb_api update
* Skip episodes which are missing SeasonNumber or Episode Number (or DVD_season or DVD_episodenumber)
* Avoid excessive calls to the ShowContainer garbage collection
* fix ShowContainer cache resizing
Add NZBGet appendurl, dupecheck/dupescore

Ported Prinz23's NZBGet 9 + appendurl + dupecheck/dupescore code from mr-orange's branch.
Updated logging/comments.
Fix username:password containing special characters
Add some logic to notifiers js to catch empty required fields, prevent unneeded testing calls. Standardize and cleanup ajax calls as well.
Add note about sending notices to PHT to just use XBMC (since it mimics xbmc's json api) but with the correct port. Some minor cleanup.
Merge branch 'PR-820_tvdb_api_update' into development

* PR-820_tvdb_api_update: closes gh-820

* Skip episodes which are missing SeasonNumber or Episode Number (or DVD_season or DVD_episodenumber)
* Avoid excessive calls to the ShowContainer garbage collection
* fix ShowContainer cache resizing
Merge branch 'PR-821_nzbget_update_fix' into development

* PR-821_nzbget_update_fix: closes gh-821
  Fix username:password containing special characters
  Add NZBGet appendurl, dupecheck/dupescore
Merge branch 'PR-823_update_notifiers2' into development

* PR-823_update_notifiers2: closes gh-823
  Add note about sending notices to PHT to just use XBMC (since it mimics xbmc's json api) but with the correct port. Some minor cleanup.
  Add some logic to notifiers js to catch empty required fields, prevent unneeded testing calls. Standardize and cleanup ajax calls as well.