Modified directory structure

Made folders for each type of file. You will need to ensure you follow
these steps when creating new files:
1. find the parent directory in the file system
2. if creating a new folder, create this in the file system first. Name
it appropriately.
3. go into Xcode and find the parent folder you want to add the folder
to, and right click -> add files to UniLife.
4. select the new folder and make sure that the copy items into
destination folder isn’t selected. Click ok.
5. you should now be able to reference the file system structure and
add files appropriately.