Further Improvements to datatable function

[davidruvolo51]

The following improvements to the datatable are needed.

• Improve the naming convention of helper functions: this is probably a bit far down the list of "needs", but it is probably better to get this done early. The names of helper functions could be improved to make them more memorable. Rethink the names of the functions and come up with a naming system that could be reused in other component.s
• Add more options to control the styling of the table output: more options to control the rendering of style (i.e., css attributes) is needed for non-shiny usage. For example, disabling the rendering of classes and injecting the html dependencies altogether. This would be useful if a user needs a simple html table generator
• Improve the handling of component defaults: the current method is not ideal. Instead, the style and options arguments should passed in through .... A new argument validation function will need to be written. Consider moving the css argument into style. Move documentation for these arguments to a new section

[davidruvolo51]

Commit fcba0ac addresses these issues. See pull request for more details

[davidruvolo51]

Merged in #4. Additional style and options props might be added in the future.