add ess-developer-load-package

   An interface to load_all from devtools package

git-svn-id: https://svn.r-project.org/ESS/trunk@5653 0bbaf3bd-34e0-0310-bf65-c717079852d4
hook ess-developer-load-package on C-c C-t l

   loggers moved to L instead (nobody is using them anyways)

git-svn-id: https://svn.r-project.org/ESS/trunk@5654 0bbaf3bd-34e0-0310-bf65-c717079852d4
optional name argument in get-ess-buffer

git-svn-id: https://svn.r-project.org/ESS/trunk@5655 0bbaf3bd-34e0-0310-bf65-c717079852d4
rename get-ess-process into ess-get-process-buffer

git-svn-id: https://svn.r-project.org/ESS/trunk@5656 0bbaf3bd-34e0-0310-bf65-c717079852d4
rename get-ess-process into ess-get-process

   Namespace cleanup

git-svn-id: https://svn.r-project.org/ESS/trunk@5657 0bbaf3bd-34e0-0310-bf65-c717079852d4