show objects of class Date correctly in the environment pane
check whether breakpoints are available (R >= 2.14) at startup
Merge remote-tracking branch 'origin/master' into bugs/debugging
show warning rather than setting a breakpoint if R version is too old
show warning rather than setting a breakpoint if R version is too old
Merge branch 'bugs/debugging' of github.com:rstudio/rstudio into bugs/debugging

Conflicts:
	src/cpp/session/modules/SessionBreakpoints.cpp
refresh environment on first listing when bringing uninitialized session back from a project
ensure environment list from client when restoring a session
disable/hide error management features if R doesn't support them
make environment checkboxes clear and consistent (and restrict to global environment)
restore moved import block
fix bug: when locked environment is loaded first, switching to unlocked environment shows incorrect column widths
Merge pull request #63 from rstudio/bugs/debugging

Rollup of fixes for bugs found in 0.98
fix break into error handler in R older than 2.15.1
Merge pull request #64 from rstudio/bugs/debugging

Fix break into error handler in R older than 2.15.1
Merge remote-tracking branch 'origin/master' into v0.98-shiny