Fix for inability to edit property comments

- plus e2e test

Fixes #456
bin: add --help and --version
Merge pull request #462 from strongloop/fix/456-cannot-edit-property-comments

Fix for inability to edit property comments
Show custom help for missing oracle connector
Always show help message for the global error
Merge pull request #477 from strongloop/feature/better-error-message-for-oracle-connector

Feature/better error message for oracle connector
Merge pull request #468 from strongloop/feature/cli-help-version

bin: add --help and --version