Add disclaimer to the repo highlighting that we are not owning the Melb. PS data

[ydaponte]

Add disclaimer on Melbourne data until we have a workaround.

DoD
Add a disclaimer on the ReadMe file stating that Microsoft don't own Melbourne Data and soon we will be using synthetic and non-real datasets for the sample.

[ydaponte]

This is no longer necessary, as PR #986 will address the main issue. Closing issue.