- CODABLOCKF: fix misencodation of extended ASCII 0xB0-0xB9 when

followed by digit (ignore 2nd byte of FNC4 when categorizing
  Code C characters)
- New `ZBarcode_Cap()` flag `ZINT_CAP_BINDABLE`, differentiated
  from `ZINT_CAP_STACKABLE`, and new Qt Backend method
  `isBindable()`
- CLI: fix `separator` check to use new `ZINT_CAP_BINDABLE` instead
  of `ZINT_CAP_STACKABLE`
- ZBarcode_Cap: add missing symbologies to `ZINT_CAP_BINDABLE` (was
  `ZINT_CAP_STACKABLE`)
- DOTCODE: pad rows if given number of columns instead of failing
  if rows below min (5)
- DBAR/composites: ensure stacked symbologies and composites are
  not stacked (set `symbol->rows` to 0)
- test suite: move `test_perf` routines into single test
  "test_perf";
  new "test_random" (based on "test_bwipp") to test various
  symbologies with random binary - discovered CODABLOCKF bug;
  expand "test_bwipp"
manual: Feeback: mention AZTEC -1 meaning min & MICROPDF417:
  doc new `ZINT_CAP_BINDABLE`
general: various code fiddlings and re-formattings

backend/tests/CMakeLists.txt

@@ -81,6 +81,7 @@ zint_add_test(medical test_medical)
 zint_add_test(output test_output)
 zint_add_test(pcx test_pcx)
 zint_add_test(pdf417 test_pdf417)
+zint_add_test(perf test_perf)
 zint_add_test(plessey test_plessey)
 if(ZINT_USE_PNG AND PNG_FOUND)
 zint_add_test(png test_png)
@@ -89,6 +90,7 @@ zint_add_test(postal test_postal)
 zint_add_test(print test_print)
 zint_add_test(ps test_ps)
 zint_add_test(qr test_qr)
+zint_add_test(random test_random)
 zint_add_test(raster test_raster)
 zint_add_test(reedsol test_reedsol)
 zint_add_test(rss test_rss)