Icons for ortho layout, and for screenshot. Temporarily disabling

fsl/fslview/controls/orthotoolbar.py

fsl/fslview/icons/camera_32.png

fsl/fslview/icons/gridLayout_32.png

fsl/fslview/icons/horizontalLayout_32.png

fsl/fslview/icons/sources/camera.png

fsl/fslview/icons/sources/gridLayout.xcf

fsl/fslview/icons/sources/horizontalLayout.xcf

fsl/fslview/icons/sources/verticalLayout.xcf

fsl/fslview/icons/verticalLayout_32.png

fsl/fslview/toolbar.py