AST Version 9.0.0

Main changes since v8.7.2:

• Functions such as astResample and astMask that handle grids of data
  values now have alternative interfaces that can handle grids that contain
  more pixels than can be represented in a 4-byte integer. This is achieved
  by using 8-byte integer arguments in place of 4-byte arguments. The names
  of these "8-byte" interfaces are the same as the 4-byte interfaces but
  have the digit "8" appended to the function name (before any trailing data
  type code). These new interfaces are documented in an extra paragraph
  entitled "Handling of Huge Pixel Arrays" attached to the reference
  documentation for each such function.

Note, all C or C++ code that uses AST should be recompiled to pick up
changes made to the header file ast.h. This should be done even if you do
not intend to use the new 8-byte interfaces.