Add XBitmap (*.xbm) support

add XBitmap(*.xbm) support, to directly use exported GIMP xbm files. (Rename the file to *.c and open in editor.)
Add XBitmap (*.xbm) support

add XBitmap(*.xbm) support, to directly use exported GIMP xbm files. (Rename the file to *.c and open in editor.)
XBitMap support (*.xbm) description

Add description of XBitMap support extension.
XBitMap support (*.xbm)

refine description
Fix merge conflict.
Merge branch 'subsonicpulse-master'