Changed MIME-Type from 'audio/mp3' to 'audio/mpeg'. Firefox for Android dosn't like play files with the first one.
Integration of IndexedDB API to save Files on Firefox
Using own copy of jquery instead of CDN
Change the rendering of episodes. It shows the download link in browsers with Indexed DB API ore File System API
Add callback functions to playEpisode() and activateEpisode() to handle the asyncron calls of the IndexedDB API
Fix two bugs: 1. Use Number for IndexedDB-Shema-Version instead of string (for IE 11). 2. Changed the usage of this in updateIndexedDB().