Added in Boardv1-1 jar file
#1 created some backend objects
#1: making things lowercase
#1: removed list of char. replaced with string
#1: implemented contains
#1: implemented find
#1: modified randomCharacters to a map where key is Character and value is visible flag
#1: created revealNextCharacter
#1: added in improvement to revealNextCharacter
#1: created prompt