* minor changes
* refactored data items
+ added sparse data item
Merge branch 'master' of https://github.com/lsoft/ml into samr

Conflicts:
	MyNN/MyNN.sln.DotSettings.user
	MyNN/MyNNConsoleApp/Program.cs
	MyNN/MyNNConsoleApp/RefactoredForDI/TrainDBN.cs