Release 0.2.3 - For loops

Bug fixes:

• Memory corruption in division of large numbers (#70)
• Parsing 'X⁻¹+(Y²+Z³)' resulting in syntax error (#76)
• Parsing -80/60 resulting in 4/3 (sign lost) (#78)
• Large numbers written to state file had separators (#83)
• Render names on stack as 'ABC' instead of 'ABC' (#84)
• Evaluate names as 'ABC' and not ABC (#86)
• Directory corruption following purge (#87)
• Local blocks now always execute (#90)
• Correct spacing of control structures on stack

Features:

• Keyboard binding to create lists (#89)
• Implementation of for loops (#92)

Other:

• Solidified the test suite further, added many tests
• Added reference to FOSDEM talk to README.md
• Added Freedom Covenant to the repository

Signed-off-by: Christophe de Dinechin christophe@dinechin.org