add docs

docs/doc.blg

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+This is BibTeX, Version 0.99c (Web2c 7.5.2)
+The top-level auxiliary file: doc.aux
+The style file: alpha.bst
+Database file #1: doc.bib
+You've used 2 entries,
+            2543 wiz_defined-function locations,
+            568 strings with 4623 characters,
+and the built_in function-call counts, 650 in all, are:
+= -- 61
+> -- 16
+< -- 2
++ -- 4
+- -- 4
+* -- 42
+:= -- 113
+add.period$ -- 6
+call.type$ -- 2
+change.case$ -- 9
+chr.to.int$ -- 2
+cite$ -- 2
+duplicate$ -- 31
+empty$ -- 56
+format.name$ -- 8
+if$ -- 129
+int.to.chr$ -- 1
+int.to.str$ -- 0
+missing$ -- 3
+newline$ -- 13
+num.names$ -- 6
+pop$ -- 12
+preamble$ -- 1
+purify$ -- 12
+quote$ -- 0
+skip$ -- 22
+stack$ -- 0
+substring$ -- 39
+swap$ -- 2
+text.length$ -- 2
+text.prefix$ -- 2
+top$ -- 0
+type$ -- 12
+warning$ -- 0
+while$ -- 6
+width$ -- 3
+write$ -- 27