TELEPEN/TELEPEN_NUM: support AIM-defined Start/Stop characters

with option "--vers=1" (API `option_2 = 1`);
  define minimum height based on AIM USS Telepen
TELEPEN_NUM: support switching to Full ASCII mode with DLE;
  max digits 136 -> 138
TELEPEN: support switching to Compressed Numeric Mode with DLE
  if AIM-defined Start/Stop enabled
CLI: make args for  "--dmb256", "--dmc40", "--scalexdimdp" and
  "--scmvv" optional
library: new escape sequences `\L`, `\F`, `\N`, & refactor parsing
  to use `escs` table
ZBarcode_Scale_From_XdimDp: allow TXT filetype (so "--dump" test
  works)
output: Telepen default quiet zone confirmed as 10X
aztec/dmatrix: fix source line too long
man page: embolden options and emphasize args;
  add barcode names to standards; various other fixes

frontend_qt/frontend_qt_zintdll.pro

@@ -49,6 +49,8 @@ FORMS += extCLI.ui \
          grpPZN.ui \
          grpQR.ui \
          grpRMQR.ui \
+         grpTelepen.ui \
+         grpTelepenNum.ui \
          grpUltra.ui \
          grpUPCA.ui \
          grpUPCEAN.ui \