client: Make ISR version number a named constant
client: Make ISR version number a named constant

- Add ISRVERSION named constant, rather than substituting !!VERSION!!
everywhere we need it

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr