Engine 0.20.1

-reverted some changes done in 0.20.0 update
-added proper handling of non-standard data in volume's free space
- new type "Free space" added
- added machine type information
- solved a typo in DOS/PE signature check

uefitool.pro

@@ -10,6 +10,7 @@ SOURCES  += uefitool_main.cpp \
  types.cpp \
  descriptor.cpp \
  ffs.cpp \
+ peimage.cpp \
  ffsengine.cpp \
  treeitem.cpp \
  treemodel.cpp \