release-1.8

This release makes a small number of improvements to the interpreter:

• Allow assignments without LET.
  • #80
• Allow DATA to be READ into an array-variable.
  • Previously only scalar-variables could be the target of READ.
  • #88
• Publish binaries for Microsoft Windows.
  • #84
• Mentioned some of our limitations, and limit the scope of the project in our README.md file.
  • Specifically this section of the README.md file.
  • #79
• We now correctly ignore DATA and DEF FN statements inside comments.
  • #93
• We've added the SWAP primitive to allow exchanging two variable contents.
  • This is demonstrated in the 100-array-sort.bas example program.
  • #90