Add emoji support

[gagolews]

Support for emojis added in ICU 57

 	400	    /** 
 	401	     * Binary property Emoji. 
 	402	     * See http://www.unicode.org/reports/tr51/#Emoji_Properties 
 	403	     * 
 	404	     * @draft ICU 57 
 	405	     */ 
 	406	    UCHAR_EMOJI=57, 
 	407	    /** 
 	408	     * Binary property Emoji_Presentation. 
 	409	     * See http://www.unicode.org/reports/tr51/#Emoji_Properties 
 	410	     * 
 	411	     * @draft ICU 57 
 	412	     */ 
 	413	    UCHAR_EMOJI_PRESENTATION=58, 
 	414	    /** 
 	415	     * Binary property Emoji_Modifier. 
 	416	     * See http://www.unicode.org/reports/tr51/#Emoji_Properties 
 	417	     * 
 	418	     * @draft ICU 57 
 	419	     */ 
 	420	    UCHAR_EMOJI_MODIFIER=59, 
 	421	    /** 
 	422	     * Binary property Emoji_Modifier_Base. 
 	423	     * See http://www.unicode.org/reports/tr51/#Emoji_Properties 
 	424	     * 
 	425	     * @draft ICU 57 
 	426	     */ 
 	427	    UCHAR_EMOJI_MODIFIER_BASE=60, 

[gagolews]

We need ICU 59 for everybody. That's all

#193