When the search hits a dead end, the trombones change slide position.
Create a class to serialize trombone parametric data into JSON
TromboneSerializer can now parse full paths
Made TromboneSerializer return an ascii score
Now the slide position changes pivot with keeping the same pitch
Changed some search functions.
Changed directory structure.
Made a number of changes to file structure to (get close to) conforming to gem specs.
Added specs and code for evaluating metrics on the trombone vectors
Added .parse method to generate Ruby object for strings
Spec'd the string generator, revised trombones.