Shrimp Shader Generator FLTK2 GUI (SVN)

-Add EDIT menu with : Group 'g' /Ungroup'u'/Edit block 'e'/Delete blocks 'Delete'

-Remove last shortcut hack it was a problem of fltk version
-Create shortcut for ungrouping node key 'u'
-Highlight border and tlltle of group
-Add selection color change for group

-Change the shortcut of edit block no more mouse double click instead key 'e'
-Make shortcut of CTRL+G and CTRL+A working(I try older version 178 and those shortcut wasnt working)
-Create shortcut for grouping node key 'g'

-Change the shortcut of edit block no more mouse double click instead key 'e'
-Make shortcut of CTRL+G and CTRL+A working(I try older version 178 and those shortcut wasnt working)

-Delete single and multi selection of node using Delete Key
-Double click on block = edit block (will be change when window parameter will be available)

Frikin typos, again - simple_AOV example scene was wouwoued, added __shadow as required, hope this is the last one i spot.

Updated AOV example and default distant light shader to use __shadow.

Forgot to add __inshadow to light blocks.

Small tweak, renamed shadow variable __shadow, will add __unshadowed later.

Added simple AOV example. Added support for light categories as part of shrimp generated output vars, together with __nondiffuse, __nonspecular, __inShadowC. Added support for light categories in the shading functions blocks. All illuminance() statements now have a respective category variable. Updated the examples to use light categories. Updated all light blocks so that the user can set the light category. The grid shader now outputs correctly to aov_surface and aov_diffuse AOVs, and the default distant light shader now has __nondiffuse and __nonspecular.