precaution against package "conjoint"

git-svn-id: https://svn.r-project.org/R/trunk@63563 00db46b3-68df-0310-9c12-caf00c1e9a41
clarifications

git-svn-id: https://svn.r-project.org/R/trunk@63565 00db46b3-68df-0310-9c12-caf00c1e9a41
more checks of imports etc

git-svn-id: https://svn.r-project.org/R/trunk@63567 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks

git-svn-id: https://svn.r-project.org/R/trunk@63568 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63569 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63570 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63571 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak

git-svn-id: https://svn.r-project.org/R/trunk@63572 00db46b3-68df-0310-9c12-caf00c1e9a41
Enable non-attribute case of relop code for integer as well as real operands.


git-svn-id: https://svn.r-project.org/R/trunk@63573 00db46b3-68df-0310-9c12-caf00c1e9a41
check for Depends which are not imported

git-svn-id: https://svn.r-project.org/R/trunk@63574 00db46b3-68df-0310-9c12-caf00c1e9a41
document new checks

git-svn-id: https://svn.r-project.org/R/trunk@63575 00db46b3-68df-0310-9c12-caf00c1e9a41
tweak other branch

git-svn-id: https://svn.r-project.org/R/trunk@63576 00db46b3-68df-0310-9c12-caf00c1e9a41