Fix ri and pool (2.17.1)
mice 2.17
delete .R files to replace by .r in next commit
Reintroduce .r files
Correct stripplot problem. 2.17 as on CRAN.
Merge remote-tracking branch 'upstream/master' into multilevel

This carries us slightly beyond the 2.17 release.

Conflicts:

	DESCRIPTION
resolved by keeping the alphabetic order of multilevel branch.
some ddply discoveries but still needs review