Add IPA symbols
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I would suggest adding the characters in the range 1DC4-1DC9 (http://en.wikipedia.org/wiki/Combining_Diacritical_Marks_Supplement). These are needed to represent contour tones in the IPA alphabet (cf. http://upload.wikimedia.org/wikipedia/commons/1/15/IPA_chart_2005.png).
I'll look at these and add them as soon as possible.