Fixed repl for not producing MNU and Warning.

- Repl>>eval:on:
 BlockClosure>>tryCatch: instead of Object>>try:catch:.
- Repl>>encapsulateVariable:withValue:in:
 Compiler>>install:forClass:protocol: instead of Compiler>>install:forClass:category:
Merge pull request #939 from mumez/cli-repl-fix

Fixed repl for not producing MNU and Warning.