fixed couple of problems for the Z class. Others still to be fixed.
Problem solved. Now it runs and produces the tree for the Z class, containing the Z0 4-momentum
and the momentum of each of the two electron candidates,
Merge commit 'cf38e001598487431a212e25ea445c6e049dd734'
Doxygen comments cleaned a bit
Removed recoil p_T variable in favour of three momentum and updated the calculating it method
A number of minor stylistic changes only
Remove unused variables
Remove unused class. See WEvent class in StRoot/StVecBosAna
Reworked this class to accept a container of jets (useful for recoil jet container)