use and remove tempfile for ESSR download

git-svn-id: https://svn.r-project.org/ESS/trunk@5801 0bbaf3bd-34e0-0310-bf65-c717079852d4
declare ess-ac-sources

git-svn-id: https://svn.r-project.org/ESS/trunk@5802 0bbaf3bd-34e0-0310-bf65-c717079852d4
add repos=NULL

git-svn-id: https://svn.r-project.org/ESS/trunk@5803 0bbaf3bd-34e0-0310-bf65-c717079852d4
ess-force-buffer-current in a couple of more places

git-svn-id: https://svn.r-project.org/ESS/trunk@5804 0bbaf3bd-34e0-0310-bf65-c717079852d4
ESSR install: add type="source"

git-svn-id: https://svn.r-project.org/ESS/trunk@5805 0bbaf3bd-34e0-0310-bf65-c717079852d4
Merge branch 'trunk'