* isleapp/res: Add icon.h
* isleapp: Set icon on non-windows systems
* isleapp: Fix formating to match with .clang-format
* isleapp: Remove _WIN32 ifdefs
This is closer to the original code. I thought it would let Windows
set the icon itself not set the icon upon window creation.
* isleapp: Load internal .BMP instead of raw pixels
This should fix the endianess problem I mentioned in the PR.
* isleapp: Only load icon from IOStream if it's valid
* isleapp: Disable format checking in ISLE/res/
* ISLE/res/resource.h: Prevent recursive inclusion
* ISLE: Remove isle.h from resource.h
also rename isle.h to isle_bmp.h
* isleapp: Fix formatting
