Offer-motivated features: :hline defaults, ranged :hpos, @date :days, :bottom none

- @table: a writer's :hline/:vline replaces the default lines; new
  boundary name 'none' removes all lines
- @table: ranged :hpos argument overrides :cell_hpos per cell
  (\multicolumn{1} in tex; positions a colspan anchor's merged cell)
- @date/@datetime: :days offset argument (sks/date/date.py)
- @document: ":bottom none" suppresses the footer (\pagestyle{empty})

Also carries the escape-system generator/renderer fixes, per-cell-range
:format, and uppercase .TTF/.OTF font recognition from klammertext-dev.

sks/date/date.k

@@ -1,11 +1,18 @@
-@@date.k : Date formatted as "16 June 1910" @@
-@@date.html :: @eval time.strftime("%d %B %Y").lstrip('0') eval@ @@
-@@date.tex :: @eval time.strftime("%d %B %Y").lstrip('0') eval@ @@
-@@date.txt :: @eval time.strftime("%d %B %Y").lstrip('0') eval@ @@
+@@date.k :days.int 0 :
+  Date formatted as "16 June 1910", offset by ^:days days from today
+  (^:days 1 is tomorrow, ^:days -1 is yesterday)
+@@
+@@date.html :: @eval date.date(K) eval@ @@
+@@date.tex :: @eval date.date(K) eval@ @@
+@@date.txt :: @eval date.date(K) eval@ @@
 
-@@datetime.k : Date formatted as "16 June 1910, 13:10 @@
-@@datetime.html :: @eval time.strftime("%d %B %Y, %H:%M").lstrip('0') eval@ @@
-@@datetime.tex :: @eval time.strftime("%d %B %Y, %H:%M").lstrip('0') eval@ @@
+@@datetime.k :days.int 0 :
+  Date and time formatted as "16 June 1910, 13:10", offset by ^:days days
+  from today (^:days 1 is tomorrow, ^:days -1 is yesterday)
+@@
+@@datetime.html :: @eval date.datetime(K) eval@ @@
+@@datetime.tex :: @eval date.datetime(K) eval@ @@
+@@datetime.txt :: @eval date.datetime(K) eval@ @@
 
 @@timestamp.k : Date and time formatted as "1910.06.16-12:34" @@
 @@timestamp :: @eval time.strftime("%Y.%m.%d-%H:%M") eval@ @@