[ANN] PsiViewer 2.16

Minor changes...
- Added in-place tooltip to property panel table for cells whose content does not fit completely within it.
- Suppressed highlight of whitespace when whitespaces are being filtered in the tree view.
- Disabled ctrlshiftq if the selected file is really a directory.

http://www.intellij.org/twiki/bin/view/Main/PsiViewerPlugin