close InputStream on loadBytes and loadStrings (issue #1542)

git-svn-id: http://processing.googlecode.com/svn/trunk@10792 fe3ceab9-de17-3b67-bb2e-7d58edd5e4d6
don't re-create graphics context on each frame

git-svn-id: http://processing.googlecode.com/svn/trunk@10793 fe3ceab9-de17-3b67-bb2e-7d58edd5e4d6