ExecuteReplCommand should use the implementation of IConsole provided to the ctor
Add test for ExecuteReplCommand.Execute
Added check for existing assembly/script in REPL. Fixes #264
Fixed failing tests and added two more
Merge pull request #263 from jrusbatch/issues/262

ExecuteReplCommand should use IConsole
Merge pull request #265 from khellang/264

Added check for existing assembly/script in REPL
Fixed merge conflicts.