Ability to extract SymbolLibrary images into image-based Symbol Definitions

[jng]

SymbolLibrary support in Maestro is very limited and is not the recommended way of stylizing features (we should be using Symbol Definitions now). To facilitate this migration, we need an easy way to convert the symbol data within these Symbol Library resources into Symbol Definitions.

Maestro has the ability to view images in a SymbolLibrary due to:

• The backing store being a DWF file
• The DWF file being able to be inspected using Drawing Service APIs

With this trick, it is possible for us to be able to convert a SymbolLibrary of images, into a set of individual image-based Symbol Definitions.

[jng]

Fixed r8015