Change semicolons to commas in viewport meta tag content list

Viewport values should be separated by commas. Chrome and Safari both generate errors/warnings
and ignore the values if characters other than comma are used.
Merge pull request #35 from cayleyh/fix-viewport-metatag

Change semicolons to commas in viewport meta tag content properties list
npmignore added
Merge branch 'master' of github.com:spine/spine.app
new coffeescript constraint ?
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node.js api update