Consolidate WordProperty and Word.

java/src/com/android/inputmethod/latin/BinaryDictionary.java

...android/inputmethod/latin/ExpandableBinaryDictionary.java

...id/inputmethod/latin/makedict/BinaryDictDecoderUtils.java

.../android/inputmethod/latin/makedict/FusionDictionary.java

...m/android/inputmethod/latin/makedict/ProbabilityInfo.java

...m/android/inputmethod/latin/makedict/Ver4DictEncoder.java

java/src/com/android/inputmethod/latin/makedict/Word.java

.../com/android/inputmethod/latin/makedict/WordProperty.java

.../com/android/inputmethod/latin/BinaryDictionaryTests.java

tools/dicttool/Android.mk

...droid/inputmethod/latin/dicttool/CombinedInputOutput.java

...tool/src/com/android/inputmethod/latin/dicttool/Diff.java

...tool/src/com/android/inputmethod/latin/dicttool/Info.java

...ndroid/inputmethod/latin/dicttool/XmlDictInputOutput.java

...roid/inputmethod/latin/makedict/FusionDictionaryTest.java