added install script

download_model.sh

@@ -1 +0,0 @@
-gsutil -m cp -r gs://aidungeon2model/model_v1 ./aidungeon/generator/gpt2/models

install.sh

@@ -0,0 +1,10 @@
+MODEL_DIRECTORY=aidungeon/generator/gpt2/models/model_v1
+
+if [ -d "$MODEL_DIRECTORY" ]; then
+    echo "AIDungeon is already installed"
+
+else
+    echo "Installing AIDungeon"
+    gsutil -m cp -r gs://aidungeon2model/model_v1 ./aidungeon/generator/gpt2/models
+    pip install -r requirements.txt
+fi