[ESS] tip for navigating camelCase

[Stephen Eglen]

> For what it's worth, I've gone with Google's style guide
> for the most part.
> 
> Hope that explains my rationale for including the
> mixed case (aka camel case) discussion as it applies
> to R using ESS!

Thanks for this Erik.  I would love to see some standardization in this
respect, but fear that too many people have too many differing styles.
e.g. I have previously used . (and hardly ever touch underscore) a lot
in R.  Looking at code in R (e.g. just browse the release notes for
2.12.0) and you will see several styles used for function names
(although I don't see much use of underscore).

Anyone from r-core care to comment -- is there a policy for new code?
(I appreciate that a lot of old function names are inherited from S).

Stephen