New: added basic gitignore for .net projects
New: added missing csproj, sln and config files

Without those file, cannot edit the projects
New: exposed method to retrieve single Episode on TVDB.cs
Cleanup: reoganized Examples project

-> static method (instead of constructor) to write examples
in console
-> retrieve ex entities in Program.cs (instead of in constructors)
Cleanup: renaming and refactoring

-> renamed EpisodeBuilder in EpisodesBuilder
-> renamed EpBuilder in EpisodeBuilder
-> refactored Episode creation in EpisodeBuilder and
EpisodesBuilder
Cleanup: Examples printing
New: use an int (instead of a string) for show id

-> avoid mistakes in user inputs
New: exposed method to retrieve updates on TVDB.cs

-> use a time interval (day, week, month, all as explained
on tvdb api)