833 Allow log level to be set in debug mode.
Always resolve null LogLevel to Info in ScriptServicesBuilderFactory.
Merge pull request #872 from jamiehumphries/833-debug-log-level

833 Allow log level to be set in debug mode.
Fix typo in test name.
Merge pull request #873 from jamiehumphries/dev

Fix typo in test name.
prefixed FileSystem locations with scriptcs_
changed command line to assume REPL when no command or script name is passed
- this is to allow running modules without having to specify -repl, e.g. scriptcs -m "migrate"
added migrate module