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StringFromName -> NameToString or N2S

better GetNumber and GetString parser functions (old GetString function has been renamed GetStringValue, to match GetValue)

(1) If and EndIf now allowed in comments and variable names (with alpha-char before or after); (2) Else now possible in If EndIf; (3) Warning if orphan EndIf.

(1) If and EndIf now allowed in comments and variable names (with alpha-char before or after); (2) Else now possible in If EndIf; (3) Warning if orphan EndIf.