CHG: Changed all IDs to Int64 to comply with SQLite standard
ADD: Init Pages
ADD: Page.LoadFromDatabase and renamed static one to LoadPagesFromDatabase
CHG: Changed playlist video container to ObservablesCollection to comply with data binding standard
ADD: Settings Video Dir
ADD: Moved GetLongTimeAsString from VlcWrapper to Utils for central access to Length->String conversion
CHG: Adapted Video.cs to fit with data binding notifier scheme
CHG: Adapted database interaction of Video.cs
CHG: Adapted CreateFromFilepath method to be more lenient