Update to 1.4.5

Changelog:

• fix a bug in soft-cut (when a cut appears in the if-part)
• fix bug when consulting multifile predicates with alternatives
• add ?- ISO prefix operator
• add gplc option --new-top-level (add top-level command-line option handling)
• fix a bug on linux witg gcc 6.3.0 (or binutils): needs PIC code
• fix a bug in findall/4
• fix a bug in select/5 under Windows
• fix a bug in the compiler
• fix a bug in read/1
• fix large address awarenes under cygwin32 (configure.in)
• improve memory limitation of acyclic_term/1
• improve term output (write/1 and friends)
• improve error handling for options (e.g. in write_term/3)
• fix bug with cut in the if-part of if-then(-else)
• fix port to x86_64/OpenBSD (machine kindly provided by Duncan Patton a Campbell)
• fix a bug with Apple/Yosemite gcc = LLVM version 6.0 (clang-600.0.56) on x86_64
• allow to define more atoms with MAX_ATOM env var on 64 bits machines
• fix a bug in bagof/3 when used as findall/3
• port to sparc64/OpenBSD (machine kindly provided by Duncan Patton a Campbell)
• add built-in predicate findall/4
• fix a bug with linedit when environment variable LINEDIT=no
• fix bugs in the FD solver
• set socket option SO_REUSEADDR at socket creation
• support for alternate Prolog file extension .prolog
• fix a bug in atoms for 1-char atom '\0' (now acts as the empty atom)
• fix problems with Apple/Mavericks gcc = LLVM version 5.0 (clang-500.2.79) on x86_64
• remove clang warnings (uninitialized variables)
• fix bugs in the lexer of the form 0bop 2 when bop is an infix op
• fix terminal ANSI sequence handling in linedit
• increase internal compiler data sizes
• fix bug in gprolog.h (invalid 64 bits PL_MAX_INTEGER)