RELEASE Journey to the Center of Hawkthorne v0.4.0

*(Did I get the release number right? I don't understand our version numbers at all anymore. But anyways, if you guys approve of the release post, delete and ignore this message and just merge)* 

Hello Hawkthornites! Although we promised to make releases more frequent, unfortunately we weren't able to keep that promise and it's been almost a month since the last release, we apologize. However, we have several new features in this new release as well as many bug fixes, so enjoy!

* New enemy behaviors: enemies are now knocked back when hit. 
* Mariachi band enemies have special behaviors and attacks
* New music for the forest
* 10 new costumes 
* Cornelius cutscene follows the episode more closely
* Bug fixes