adding state to the ScriptPackSession in order to store the Roslyn Session to enable the REPL
Adding -help / -? for returning help
Adding repl support
Adding missing file
Adding exception handling. Display the error and don't exit
make errors red
adding colors for output
Adding '>' prefix and blank lines
added engine to service root, refactored ReplCommand to grab engine off the root
Adding console wrappers and refactoring Repl to use
Merge pull request #227 from glennblock/219

REPL and supporting changes #219
Implement `Args` to pass arguments to scripts.