Fix typo

Merge branch 'master' of https://github.com/JohnsonHsieh/inext

Conflicts:
	iNEXT.R
	server.R
	ui.R
	www/about.md
	www/footnote.md
Change endpoint selecting method
fix typo
New version backup

Merge branch 'master' of https://github.com/JohnsonHsieh/inext

Conflicts:
	iNEXT.R
	server.R
	ui.R
	www/about.md
	www/footnote.md