Package Structure and Name

Renamed the library from SecurityMonkey to security_monkey to follow the
dart style guide.  Refactored much of main.dart into
lib/security_monkey.dart as this seems to be the cleaner convention.
Display dates in local timezone.

Dates are now displayed in the browser's local timezone.  Files also
underwent some format cleanup.
Fixed import references to SecurityMonkey and Formatting

Ran the Dart Editor Formatter to fix indentation on every file and fixed
import statements that were still referencing SecurityMonkey instead of
security_monkey.