infrastructure: function to capture traceback with full-path filenames
Merge pull request #43 from rstudio/bugs/debugging

Fix problems related to breakpoints in packages
show (currently useless) traceback button and wrapper around errors
Merge pull request #44 from rstudio/bugs/debugging

Fix problems in advanced package breakpoint use
move source urls to notice file
add top-level cmake script for docs
Merge remote-tracking branch 'origin/master' into feature/error-management
simple display of traceback for errors via client event
register error handler on session start; factor error UI to UIBinders
match console errors to errors emitted from custom error handler
clickable source links in error tracebacks
add error management menu & commands
auto-insert a newline at the end of R scripts when executing the last line
apply styling to traceback button
implement break-always strategy and command
implement "break in my code"; refactor some common R code
add error popup menu to console window frame (rough)
make window frame right-widgets generic
some infrastructure to support reporting changes in the error handler
add test-pam option to server