Changes in Version 0.2-1.1

   o now uses rJython (which in turn includes jython) so jython no longer 
     in rSymPy

Changes in Version 0.1-4

   o now uses jython.jar and separate sympy tree

   o upgraded to Jython 2.5.1 and sympy 0.6.5

   o now depends on rJava 0.8-1

Changes in Version 0.1-3

   o new "Sym" class with constructor Sym and methods as.character.Sym, 
     as.expression.Sym, derive.Sym, Math.Sym, Ops.Sym, print.Sym, solve.Sym,
     t.Sym

   o new functions: Eye, Integrate, Limit, List, Matrix, Zero, Zeros

   o new function: Var

   o sympy has new retclass= argument

