ico file support

[Adam@Schneider]

When creating UML profiles and MDG it seems EA is very picky on the image format.
The alternative image set in the image manager seems to accept pretty much anything, I've had issues getting the "icon" member of stereotype elements to accept some image types and I have settled on using png files. The toolbox icons seem to only accept 16x16 bitmaps at 4 bit colour, or at least that seems to be what is happening.

The transparency is also weird, the icons treat RGB 192,192,192 as transparent but ignore the alpha channel, the stereotype icons ignore both the alpha channel and the grey background, where the alternate images honour the alpha channel.

How about support for windows .ico files containing multiple image sizes and multiple depths? EA can then pick the best suitable image from the file, it can handle the transparency correctly, and it means we dont have to make bespoke versions of each image for different EA MDG features. Currently I'm having to use imagmajick to extract specific formats from my ico files.