add catkin profile installation instructions to readme

Author: wmmc88

README.md

@@ -1,2 +1,14 @@
 # dev_tools
 Aliases, shortcuts, catkin_tools configs, etc. Anything that's useful for software development on the uWaterloo Robotics Team!
+
+# Catkin Profiles
+Included in `catkin_profiles` are profiles for `catkin_tools`. Assuming you've already installed [catkin_tools](https://catkin-tools.readthedocs.io/en/latest/), install these profiles:
+```bash
+cd <catkin_ws location>/.catkin_tools
+
+# Delete profiles folder if one already exists
+rm -rf profiles 
+
+# Symlink to `catkin_profiles` folder so that profiles update when `dev_tools` is updated
+ln -s -T <path to dev_tools repo>/catkin_profiles profiles
+```