apl: idiom corpus 34→64 + fix ≢/≡ glyph recognition (+30 tests, 445/445)

30 new source-string idioms via apl-run: triangulars, factorial,
running sum/product, parity counts, identity matrix, mult-table,
dot product, ∧.= equality, take/drop/reverse, tally, ravel,
count-of-value, etc.

Side-fix: tokenizer's apl-glyph-set was missing ≢ and ≡ — they
were silently skipped.  Added them and to apl-parse-fn-glyphs.

lib/apl/tokenizer.sx

@@ -1,6 +1,6 @@
 (define apl-glyph-set
   (list "+" "-" "×" "÷" "*" "⍟" "⌈" "⌊" "|" "!" "?" "○" "~" "<" "≤" "=" "≥" ">" "≠"
-        "∊" "∧" "∨" "⍱" "⍲" "," "⍪" "⍴" "⌽" "⊖" "⍉" "↑" "↓" "⊂" "⊃" "⊆"
+        "≢" "≡" "∊" "∧" "∨" "⍱" "⍲" "," "⍪" "⍴" "⌽" "⊖" "⍉" "↑" "↓" "⊂" "⊃" "⊆"
         "∪" "∩" "⍳" "⍸" "⌷" "⍋" "⍒" "⊥" "⊤" "⊣" "⊢" "⍎" "⍕"
         "⍺" "⍵" "∇" "/" "\\" "¨" "⍨" "∘" "." "⍣" "⍤" "⍥" "@" "¯"))