- Improved spec file: R-base-devel requires R-base

- Upstream release 3.0.1
- Most important
CHANGES IN R 3.0.1:
NEW FEATURES:
o chooseCRANmirror() and chooseBioCmirror() gain an ind argument
(like setRepositories()).
o mcparallel has a new argument mc.interactive which can modify the
interactive flag in the child process. The new default is FALSE
which makes child processes non-interactive by default (this
prevents lock-ups due to children waiting for interactive input).
o scan() now warns when end-of-file occurs within a quoted string.
o count.fields() is now consistent with scan() in its handling of
newlines in quoted strings. Instead of triggering an error, this
results in the current line receiving NA as the field count, with
the next line getting the total count of the two lines.
o The default method of image() will plot axes of the class of xlim
and ylim (and hence of x and y if there is a suitable range()
method). Based on a suggestion of Michael Sumner.
o load() now has a verbose argument for debugging support, to print
the names of objects just before loading them.
o When loading a serialized object encounters a reference to a
namespace which cannot be loaded, this is replaced by a reference
to the global environment, with a warning.
o pairs() gains a line.main option for title placement.
o The remaining instances in which serialization to a raw vector
was limited to 2GB have been unlimited on a 64-bit platform, and
in most cases serialization to a vector of more than 1GB will be
substantially faster.