Gnuplot-based plotting for PDL

Changes for 2.025 - 2024-04-20

• Split version checking from `use Alien::Gnuplot` line for easier downstream packaging. Fixes #98.
• fixes for Windows (#89)
• use terminal "dumb" if probing shows "unknown" (#66)
• fix numeric-only strings for legend (#100) - thanks @d-lamb for report
• fix plot3d array-ref handling (#87) - thanks @djerius for report
• fix gplot array-ref handling (#86) - thanks @djerius for report
• add multiplot_next to skip one plot (#85)
• add documentation to UTF-8 encode text labels etc (#74) - thanks @Zaki for report
• add {multiplot,plot,multiplot_next,end_multi}_generate methods which return Gnuplot commands equivalent plot would execute (#95)

Cryptographic toolkit

Changes for 0.080 - 2023-10-04

• fix #95 AES-NI troubles on MS Windows (gcc compiler)
• fix #96 Tests failure with Math::BigInt >= 1.999840
• Enabled AES-NI for platforms with gcc/clang/llvm

Cryptographic toolkit

Changes for 0.079_004 - 2023-02-10

• fix #95 AES-NI troubles on MS Windows (gcc compiler)
• Enable AES-NI on gcc/clang/llvm
• update Math::BigInt::LTM test suite to be compatible with Math::BigInt 1.999842+