Android studioアップデートでファイルが増えた？
add assets files
update index.json and gradle
adjustment index.json
Implements multi character emoji.
Ignore variation selectors.
Debug EmojiData.
Update Emojidex#emojify().
Update Emojidex#toUnicodeString().
Update EmojiData.
Optimize imports.
Merge remote-tracking branch 'origin/combining-character-emoji'

Conflicts:
	.idea/misc.xml
	EmojidexAndroid/EmojidexAndroid.iml
	EmojidexAndroidLibrary/EmojidexAndroidLibrary.iml
	LibraryTest/LibraryTest.iml
	ReceiveSendTest/ReceiveSendTest.iml
	gradle/wrapper/gradle-wrapper.properties