Implemented MongoDB importing from XML

Implementation at SexStore.MongoServer.Data\Imports
- Added GetProducts() to SexStore.Client.Readers\XMLImporter.cs
- Added Product structure (for easier workflow)
- Changed DateTimeFormatType from constant to variable (check comment)
Merge Conflict in Helpers/NamingFactory.cs
Merge remote-tracking branch 'origin/master'

Conflicts:
	PitFiend/SexStore.Client.Readers/Helpers/NamingFactory.cs