- Moved Module 3 solutions to a new file.

- Added some troubleshooting for cycript errors.
- Fixed some typos.

Module-4/README.md

@@ -282,6 +282,21 @@ Since you need a jailbroken device for this exercise, I'm assuming you've been u
     cycript -r <Device-IP>:1337
     ```
 - You have now an interactive console that you can use to send commands to the `CoinZa` application.
+- If you get the followign error:
+```bash
+dyld: Library not loaded: /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/libruby.2.0.0.dylib
+Referenced from: /usr/local/bin/Cycript.lib/cycript-apl
+Reason: image not found
+Abort trap: 6
+```
+  - Install Ruby 2.0:
+  ```bash
+  brew install ruby@2.0
+  ```
+  - Copy the library to `Cycript.lib`
+  ```bash
+  cp /usr/local/Cellar/ruby\@2.0/2.0.0-p648_7/lib/libruby.2.0.0.dylib /usr/local/bin/Cycript.lib/
+  ```
 
 **Any version of iOS**
 - Now that you have an interactive console via `Cycript` we can start by removing that annoying popup. First we are going to use the `choose` function to get all the instances of the `UIAlertController` class. The `choose` function reads the provided class signature and searches the memory for objects that have a similar signature and returns an array of all the objects it can find: