Merge pull request #54 from vpython/Fix_bug_in_input('hello')

Fix bug in input('hello')

Author: BruceSherwood

lib/glow/primitives.js

@@ -2916,6 +2916,7 @@
 	function input(arg) { // mimics Python input function
 		arg = arg || {}
 		if (arg.prompt !== undefined && arg.prompt != '') return prompt(arg.prompt)
+		else if (toType(arg) == 'string' ) return prompt(arg)
 		else return prompt()
 	}