add MixUtils class, originally from mixare, found on
http://www.java2s.com/Code/Android/Date-Type/FormatDistance.htm
rename class, update disclaimer mentioning origin
fix indenting
convert methods to accept parameters of type double
use formatDist method
use double
use String.format for formatting numbers
drop unused method
parameterize units and scale
add JavaDoc
rename parameter from meters to distance
wrap long lines
add comments
update JavaDoc
improve file description
add todo
add note : method is localized