Add mp3, mp4, pdf, ai, psd, eps, ppt, exe, dmg to static asset list
Remove psd from prevented access list
Prevent EXE files from being downloaded on the server
Handle csv, keynote, numbers, and pages documents
Serve exe files as static assets
Merge pull request #105 from washingtonstateuniversity/file-types

[PR] Align nginx static assets config with allowed upload filetypes in WSUWP Platform