Error in icons-foundation.json
Hi,
I found an error in the icons-foundation.json.
these two lines
`{"name": "upload-cloud", "unicode": ""},`
`{"name": "usb","unicode": "f20b"},`
should be
`{"name": "upload-cloud", "unicode": "f20b"},`
`{"name": "usb","unicode": "f20d"},`