Assume unsupported types are valid
added type to tests/index.html
Revert "Assume unsupported types are valid"

This reverts commit 5dc7ab59386446c4b34e063006b983638821c061.
Revert "added type to tests/index.html"

This reverts commit 98d505f60c99cfbd26f9d6dc22340d1ca5b5cec9.
add widely supported mime types
Merge pull request #226 from attiks/224-supported-mime-types

224 supported mime types