Combine many datasets together by concatenating rows.
This module combines multiple (up to 5) datasets into a single dataset by concatenating all rows together. This is very similar to the built-in [Add Rows](https://msdn.microsoft.com/en-us/library/azure/Dn905871.aspx) module, except that it allows more than 2, up to 5, input datasets.
Note that all datasets must have the exact same schema, otherwise error will be thrown.
Source code of this module can be found in this [GitHub repo](https://github.com/Azure/custmod/tree/master/AddManyRows).
