Migrate some nodes in DynamoRevitNodes
add a space
Migarite View Nodes
Migrate DSRevit Nodes, and includes old files
The conflicts are due to the different implementation of the same function. I have changed the function signature to the correct one.

Merge branch 'Migration' of https://github.com/Benglin/Dynamo into Migration

Conflicts:
	src/DynamoRevit/Nodes/Floor.cs
	src/DynamoRevit/Nodes/Material.cs
	src/DynamoRevit/Nodes/Wall.cs
Merge branch 'Migration' of https://github.com/Benglin/Dynamo into Migration
add a missing close tag back in DynamoUnits.csproj
remove a migariton function named DSReferencePoint.ByPoint in DynamoRevit/Nodes/ReferencePoint.cs, since it doesnot work.
Migrate
Merge branch 'Migration' of https://github.com/Benglin/Dynamo into Migration
revert a space typoo
Migrate the DynamoRevit nodes
Migrate Node in Transform.cs and UV.cs
Include old files to new solution and continue migrate the nodes
Change the reference point migration method
Migrate The DynamoRevitNodes
revert an empty line in Transform.cs
Test the nodes and make small changes to fix the bugs
Merge branch 'Migration' of https://github.com/Benglin/Dynamo into Migration
Change the Implementation of Migration of Xor in dynBaseTypes.cs