Update README.md
TYPO
Delete sample page from master
Updated
Udpated
Merge branch 'master' of https://github.com/ryoyakawai/x-webmidi into gh-pages

Conflicts:
	README.md
	images/screenshot.png
	index.html
Merge branch 'gh-pages' of https://github.com/ryoyakawai/x-webmidi into gh-pages

Conflicts:
	README.md