don't execute rpm uninstall logic for upgrades
don't remove tmp streams in deb
Merge pull request #65 from rstudio/bug/rpm-update-logic

bug/rpm-update-logic
fix crash in R some implementations on R_ReleaseObject(NULL)
fix bug: debug highlighting is incorrect after changing and saving the file currently active in the debugger
fail gracefully if we can't find a token while setting breakpoints
Merge branch 'master' of github.com:rstudio/rstudio
Merge branch 'master' of github.com:rstudio/rstudio
Merge branch 'master' of github.com:rstudio/rstudio
Merge branch 'master' of github.com:rstudio/rstudio