Polex Submodule & GitIgnore

- Add polex as submodule
- Ignore docker environment file and delete from src directory
- Ignore downloaded dataset files
- Ignore particle filter output directory

.gitignore

@@ -1,6 +1,10 @@
 # Visual Studio Code
 .vscode
 
+# Docker compose environment variables
+.env
+
 # Ignore downloaded dataset files
-src/dataset/*
-!src/dataset/*.py
+src/dataset/data/*
+src/dataset/nclt
+!src/dataset/data/*.py

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "polex"]
+	path = src/polex
+	url = https://github.com/Mobile-Robotics-W20-Team-9/polex.git
+	branch = master

src/.env

@@ -1,3 +0,0 @@
-# .env for docker-compose
-
-IP_ADDRESS=192.168.1.14