CoopJournal - updated to match new data analyzer

data_generator and Simlated Dataset Manager -
    Updated to allow for user inputted velocity

    Deleted redundant code in request part of SDM
    (code extraneously copied value to msg sent out)

   In find_measurent(), updated to differentiate
   landmark over relative observations ( & prefer)

   Need to figure out what's wrong with velocity
   Then, need to test communication