* knn: a k-nearest neighbour classifier

** Usage

   Coming soon (use knn --help for instructions)

** Format
   Objects should be presented in the following form :

   ID CLASS feature1:value1 .... featuren:valuen

   where :
   - ID :: is a string identifying the object
   - CLASS :: is the class of the object
   - feature/value pairs :: features are are strings while values must be numbers