Images, shaders and sound files are imported directly under projects content directory

Assets should be added in "images", "shaders", "sounds" and "fonts" sub-directories under projects content directory. Currently only fonts are added correctly, other 2D asset file types are imported directly under content -directory.

Steps to reproduce:

• Add the attached assets to a project
• fonts are added to content -> fonts 
• images, shaders and sound files are added directly under content directory
• -> empty shaders, images and sounds folders are created in root of the project