iOS 7: "Binary Images" no longer has "+" column

TODO: Determine the exact meaning of this column, and from what iOS version it
      first appeared. It seems to have been used to mark dynamically-loaded
      libs (e.g. tweaks), but whether this was its true purpose is unknown.
Use 'proper' types (uint32_t, uint64_t)
Set correct type for params of nameForLocalSymbol()
Updated struct _dyld_cache_header

NOTE: Technically unnecessary, as we do not read any values beyond the
      localSymbols* entries.
Added 64-bit support to nameForLocalSymbol()
Added 64-bit support to linkCommandOffsetForHeader()
Commented out uuid field of dyld_cache_header

NOTE: This field is not present in earlier versions of iOS (and, in fact, may
      not even be present in iOS 7). It's existance caused local symbol lookup
      to fail on earlier iOS versions.
      (Why its presence/absence did not affect iOS 7... it is assumed that mmap
      was automatically adjusting the passed offset to the nearest page, and
      that 16 bytes (the size of the uuid field) did not make a difference.)
Build armv6 version (i.e. specified a subtype)
Updated for release (v1.3.0)