* Support xml namespace prefix for JSX elements and attributes
Just as with the `-` character, `:` is now also treated specially in JSX
element and attribute names, but is only allowed a single time, and not
at the beginning or end of the name, as is specified in the JSX spec.
All tests in jsxInvalidEsprimaTestSuite still fail, but for slightly
different reasons now. Two lines in jsxEsprimaFbTestSuite were
uncommented as they included elements with namespaces, and they now pass
without error.
* Add case for colons at ends of identifier
* Add case for jsx namepsace intrinsics
* Add cases with upcase idents for jsx namespaces
* Add case for jsx namespaces with react option
* Always consider jsx names with colon to be intrinsics
* Adjust comment about chars valid in jsx names but not js idents
* Fix minor typo in namespace prefix test case variable name
* Remove misleading comments on isUnhyphenatedJsxName
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