Cleans un-used guides assets leftover from splitting books

Usage Overview

guides-cleaner clean-content <path_to_the_project>

sh -c "$(curl -fsSL https://raw.githubusercontent.com/codio/guides-cleaner/master/installer.sh)"

Download the linux binary (content-checker-linux-amd64.tgz) under Releases
Drag-and-drop guides-cleaner-linux-amd64.tgz into the Codio assignment or project filetree
In the Codio terminal, extract the binary:
```
tar zxf guides-cleaner-linux-amd64.tgz
```
In the Codio terminal, run the code:
```
./guides-cleaner clean-content
```

Download the linux binary (guides-cleaner-linux-amd64.tgz) under Releases
Drag-and-drop guides-cleaner-linux-amd64.tgz into the Codio assignment or project filetree
In the Codio terminal, extract the binary:
```
tar zxf guides-cleaner-linux-amd64.tgz
```
Clone the two assingments you want to merge into Codio
In the Codio terminal, run the code:
```
./guides-cleaner merge <destAssignmentPath> <mergeAssignmentPath>
```
Note: The second assignment path (merge) is appended to the end of the first assignment path (dest) For example:
```
./guides-cleaner merge cs-intro-python-loops/ cs-intro-python-conditionals/
```
Conditionals would be appended after the loops content

If you want to append content into the existing content (in .guides), set the <destAssignmentPath> to ./. Make sure your <mergeAssignmentPath> ends with a / or it will overwrite the content.

To move content into .guides (overwriting any existing content in .guides), set the <destAssignmentPath> to ..