Making headers and source public for tools within Unifyfs.

[hariharan-devarajan]

Describe the problem you're observing

Currently, unifyfs supports several tools such as transferring data from pfs to unifyfs. These tools are extremely useful but there is no programmatic way to use these tools.

It would be great if we could expose a lib of these tools by extracting the main logical pieces and expose their header for including in any application.

Currently, I copy the transfer utility code into my repository and include it to perform prefetching from pfs to unifyfs.