Split off two separately-built libs from main CNTK project: CNTKCompu…

…tationNetworkLib and CNTKSGDLib. These have their own directories now, and their include paths only include libs below (but not the CNTK project, for example), enforcing some modularization.

Changed some scalar numerical values from ElemType to double, where this distinction did not add value, for example for objective values, frame-error rates, and learning rates.

Lots of minor cleanup such as reducing header dependencies (e.g. Matrix.h), consistency of template<typename/class ElemType>, and moved some misplaced code to more appropriate places (e.g. LearnableParameter initializations).

Merge branch 'master' into fseide/netlib

Conflicts:
	MachineLearning/CNTK/CNTK.cpp

MachineLearning/CNTK/CNTK.cpp

@@ -732,15 +732,13 @@ void DoTrain(const ConfigParameters& config)
 
     if (config.Exists("NDLNetworkBuilder"))
     {
-        ConfigParameters config(config("NDLNetworkBuilder"));
-        //netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(static_cast<IComputationNetBuilder<ElemType>*>(new NDLBuilder<ElemType>(config)));
-        netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(new NDLBuilder<ElemType>(config));
+        ConfigParameters ndlNetworkBuilderConfig(config("NDLNetworkBuilder"));
+        netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(new NDLBuilder<ElemType>(ndlNetworkBuilderConfig));
     }
     else if (config.Exists("SimpleNetworkBuilder"))
     {
-        ConfigParameters config(config("SimpleNetworkBuilder"));
-        //netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(static_cast<IComputationNetBuilder<ElemType>*>(new SimpleNetworkBuilder<ElemType>(config)));
-        netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(new SimpleNetworkBuilder<ElemType>(config));
+        ConfigParameters simpleNetworkBuilderConfig(config("SimpleNetworkBuilder"));
+        netBuilder = unique_ptr<IComputationNetBuilder<ElemType>>(new SimpleNetworkBuilder<ElemType>(simpleNetworkBuilderConfig));
     }
     else if (config.Exists("ExperimentalNetworkBuilder"))   // for testing/early access to NDL extensions
     {