assign breakpoints in ESSR (not base)

git-svn-id: https://svn.r-project.org/ESS/trunk@5595 0bbaf3bd-34e0-0310-bf65-c717079852d4
refactoring

   inferior-ess-load-command -> ess-load-command
   ess-tracebug-inject-source-p -> ess-inject-source

git-svn-id: https://svn.r-project.org/ESS/trunk@5596 0bbaf3bd-34e0-0310-bf65-c717079852d4
new ess-load-visibly-command and better source injection

   Add source injection to ess-eval-buffer. The variable
   ess-inject-source is now function-and-buffer by default.

   For visible evaluation of "source injected" code, use source(...,
   echo=TRUE) instead of ess-eval-linewise.

git-svn-id: https://svn.r-project.org/ESS/trunk@5597 0bbaf3bd-34e0-0310-bf65-c717079852d4
indentation in ess-site.el

git-svn-id: https://svn.r-project.org/ESS/trunk@5598 0bbaf3bd-34e0-0310-bf65-c717079852d4