fix debug stepping problems when debugger is invoked from R RPC calls
Merge pull request #51 from rstudio/bugs/debugging

Fix debug stepping problems when debugger is invoked from R RPC calls
fix unnecessary display of data frame icon in name column
Merge pull request #52 from rstudio/bugs/debugging

Fix unnecessary display of data frame icon in name column
make 'safe' adding and removing of pulse classes even safer
remove pulse on value change
Merge remote-tracking branch 'origin/master' into bugs/debugging

Conflicts:
	src/gwt/src/org/rstudio/studio/client/workbench/views/environment/view/EnvironmentObjects.java
Merge pull request #53 from rstudio/bugs/debugging

Remove pulse on value change