[ESS] cleanup ess namespace (prefix)

[Leo Liu]

On 2013-03-16 16:29 +0800, Vitalie Spinu wrote:
> For consistency and better user experience we probably should rename
> those 4. One obvious alternative is the following:
>
>    ess-get-process
>    ess-get-process-buffer
>    ess-with-process-buffer
>    ess-update-process-name-list
>
>     Vitalie

Thanks for looking into this. I think this renaming is good in the long
term. Meanwhile obsolete aliases can be defined if any of them are
public API.

Thanks,
Leo