Replace geda_warning.png, Add new svg file
String Cleaning!
Add o_picture_get_rgb_data and o_picture_get_mask_data
Continuing development of new renderer, all primary objects working!
Revise header of headers; top-level & libgeda
Update email address for P. Clifton
Revised headers of source file to include would-be shebang lines
Return boolean; o_picture_embed and o_picture_unembed
Revise o_embed to return boolean
Add new function o_get_is_embedded
Header Maintenance; mostly Copyright and License stuff