correct compiler warnings.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@479 c67418bc-a6eb-11de-8ba5-91705c1537ed
Adding osgwinfo application.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@480 c67418bc-a6eb-11de-8ba5-91705c1537ed
Documentation tweaks.

git-svn-id: http://osgworks.googlecode.com/svn/trunk@481 c67418bc-a6eb-11de-8ba5-91705c1537ed