Added new README for this collection

B_Root_Anomalies/README.md

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+# B-Root Anomalies
+
+This folder contains labeling program for B-Root anomalies dataset.
+Run:
+```
+make
+```
+to create `tag` executable. There are
+several folders, containing information on how to use `tag` executable
+with the original data to produce record-level tags.
+The record-level labels look like:
+```
+recordID label
+```
+where recordID looks like:
+```
+timestamp-sourceIP-sourceport-destIP-destport
+```