File cleanup.
Indendting to 4 spaces.
Not building pages that start with "_"
Adding the prefix to ignore files with to the arguments and doing some cleanup / refactoring to the arguments.
Formatting back to 3 spaces.
Getting updates from BetterJargs
closes #18:  Support URL rewriting. enhancement.
Wrong file path due to FilePath.resolve update.
Adding a result prefix exclude.
Correcting the check for the assetPrefixInBrowser.
Removing the warning for asset prefixes that end in '/' and updating the arguments.
Correcting the assetPrefixInBrowser yet again.  It should default to '' when the path is '/' or ends with '/'.