preserve library grouping in packages pane
show helpful message when help is invoked on uninstalled packages
show helpful message when attempting to load an uninstalled package
better spacing and alignment for remove button cross-platform
url encode prior to launching browser on osx
protect against null sessionInfo when checking for project
another null check
delay subscribing to the deferreed init completed event in packages pane
tweak library header appearance in packages pane
don't embed packrat; bump required version
expose restart function
make restart commands optional
detect packrat availablity right when the project options dialog opens
initial work on bootstrap/options ui
Merge remote-tracking branch 'origin/master' into packrat-packages-pane
Merge pull request #117 from rstudio/packrat-packages-pane

Packrat packages pane improvements
Merge branch 'master' into feature/packrat-restore-actions

Conflicts:
	src/gwt/src/org/rstudio/studio/client/packrat/Packrat.java
Don't include spaces in < missing > to avoid wrapping problems
Use ModalDialog<Void> instead of ModalDialogBase
Whitespace / formatting