Update README.md

README.md

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 # InteractionImitation
 Imitation Learning with the INTERACTION Dataset
+
+## Getting started
+Clone InteractionSimulator and pip install the module.
+```
+git clone https://github.com/sisl/InteractionSimulator.git
+cd InteractionSimulator
+git checkout v0.0.1
+pip install -e .
+cd ..
+export PYTHONPATH=$(pwd):$PYTHONPATH
+```
+Install additional requirements
+```
+pip install -r requirements.txt
+```
+Copy INTERACTION Dataset files:
+The INTERACTION dataset contains a two folders which should be copied into a folder called `./InteractionSimulator/datasets`: 
+  - the contents of `recorded_trackfiles` should be copied to `./InteractionSimulator/datasets/trackfiles`
+  - the contents of `maps` should be copied to `./InteractionSimulator/datasets/maps`