Add Emoji properties

source/data/unidata/changes.txt

-* Copyright (C) 2004-2015, International Business Machines
+* Copyright (C) 2004-2016, International Business Machines
 * Corporation and others.  All Rights Reserved.
 *
 *   file name:  changes.txt
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 2004may06
 *   created by: Markus W. Scherer
 *
@@ skipping 26 matching lines @@
 Aran can be added as USCRIPT_ARABIC_NASTALIQ at any time.
 
 Adlam, Marchen, and Osage are expected to go into Unicode 9;
 we should assign Unicode script property value aliases for them
 soon after Unicode 8 is released, and add them in ICU 56.
 
 Khitan scripts will be encoded later.
 
 ---------------------------------------------------------------------------- ***
 
+Emoji properties added in ICU 57: http://bugs.icu-project.org/trac/ticket/11802
+
+Edit preparseucd.py to add & parse new properties.
+They share the UCD property namespace but are not listed in PropertyAliases.txt.
+
+Add emoji-data.txt to the input files, from http://www.unicode.org/Public/emoji/
+Initial data from emoji/2.0/
+
+ICU_ROOT=~/svn.icu/trunk
+ICU_SRC_DIR=$ICU_ROOT/src
+ICUDT=icudt56b
+export LD_LIBRARY_PATH=$ICU_ROOT/dbg/lib
+SRC_DATA_IN=$ICU_SRC_DIR/source/data/in
+UNIDATA=$ICU_SRC_DIR/source/data/unidata
+
+Add binary-property constants to uchar.h enum UProperty & UProperty.java.
+
+~/svn.icutools/trunk/src/unicode$ py/preparseucd.py ~/unidata/uni80/20151217 $ICU_SRC_DIR ~/svn.icutools/trunk/src
+(Needs to be run after uchar.h additions, so that the new properties can be picked up by genprops.)
+
+Data structure: uprops.h/.cpp, corepropsbuilder.cpp, UCharacterProperty.java
+
+make install, then icutools cmake & make, then
+~/svn.icutools/trunk/dbg/unicode/c$ make && genprops/genprops $ICU_SRC_DIR
+
+Generate Java data as usual, only update pnames.icu & uprops.icu.
+
+---------------------------------------------------------------------------- ***
+
 Unicode 8.0 update for ICU 56
 
 * Command-line environment setup
 
 ICU_ROOT=~/svn.icu/trunk
 ICU_SRC_DIR=$ICU_ROOT/src
 ICUDT=icudt56b
 export LD_LIBRARY_PATH=$ICU_ROOT/dbg/lib
 SRC_DATA_IN=$ICU_SRC_DIR/source/data/in
 UNIDATA=$ICU_SRC_DIR/source/data/unidata
@@ skipping 2327 matching lines @@
 
 * name matching
 - read UCD.html
 
 * scripts
 - use new Hrkt=Katakana_Or_Hiragana
 
 * ZWJ & ZWNJ
 - are now part of combining character sequences
 - break iteration used to assume that LB classes did not overlap; now they do for ZWJ & ZWNJ