Ad Updating R-devel section to website

[hturner]

It would be helpful to separate out the documentation on updating R-devel from #39.

First update the R-devel sources

cd $TOP_SRCDIR
svn update

Check your local changes

svn diff

Revert any changes you no longer want. E.g. a single file

svn revert src/library/utils/R/askYesNo.R

all changes in a directory

svn revert src/library/utils

or all local changes

svn revert -R .

Then rebuild R

cd $BUILDDIR
make # this will run the configure with same options as before
sudo make install

[StarTrooper08]

This issue can be closed