[R-sig-Geo] R 3.0.0 and spatial classes

[Barry Rowlingson]

There's been an announcement that the next version of R will be called
3.0.0. Although not a massive change (compared to Python 2.x and 3.x,
or Perl 4 to Perl 5), it might be a good opportunity to revise all the
spatial classes in order to:

 * clear out any cruft
 * remove any inconsistencies
 * add some new functionality
 * unify across spatial packages

The first thing that springs to mind, for example, is getting sp and
raster to use the same functions for coordinate reference system
processing. Doubtless there are other opprtunities for synergy...

 Yes, this may well break existing code, but if R is going to jump
from 2 to 3 then that will break existing code too.

 Your ponderances, please...

Barry