Added JGR.jar as build dependency.
Updated TODO regarding JHLIR.
New method evalInGlobalEnv for evaluations in the global environment (only used if requested by user).
Added "silent=TRUE" to 'try' call in graph2latex.
Wrapper for 'evalVoid'.
Changed rcs to wrapper subclass to call '*InGlobalEnv' methods.
Changed appropriate calls to 'evalVoidInGlobalEnv' - still open are: i) use specified environment instead of global env. ii) Don't save temporary graphs there.