autoload file with user's own custom commands
search up from current directory for '.scalding_repl' files to source
add test to verify that '.scalding_repl' is being loaded
pipe directly into $SCALD_REPL
customizable prompt
absolutely superfluous coloring of Scalding splash
explain mysterious '.scalding_repl' file
Merge pull request #1009 from twitter/bholt/repl-autoload

REPL Autoload file