Update 'README.md'

README.md

@@ -44,6 +44,7 @@ The manifest file would do several important things:
 * Replace SHASUMS/SHASUMS.asc files
 * be easy to download/resume a whole directory tree published via HTTP
 * be easy to use across protocols (given an HTTPS url, fetch manifest, then download file contents via bittorrent or ipfs)
+* not strongly coupled to HTTP use case, should not require special hosting, content types, or HTTP headers being sent
 
 # Non-Goals
 * Manifest generation speed