Added HangmanGame class, but does not work yet

Dependencies:   SDFileSystem app epson mbed msp430 pl tests

Changes

RevisionDateWhoCommit message
1:a5ec6f9dcf0d 2017-12-04 markpsymonds Fixed most compile issues in hangman.cpp/.h. default tip
0:fa7450a43b99 2017-12-04 group-FlexBook Initial commit