[Xastir] New capability: 2008 Tiger Shapefile street maps

[Curt, WE7U]

Thanks to the below mentioned people we now have Tiger 2008
streetmap capability in Xastir...  And it's really fast!  If you're
used to the Online Tigermap server, the speed of this will really
blow you away.  It's also great for taking Xastir on the road where
you don't have internet access.  Please note the special
instructions below for setting up the layering so that roads aren't
covered up.  Perhaps we can automate that part soon.

Here's the commit message from a few minutes ago:

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Modified Files:
         Makefile.am
Added Files:
         tabblock.dbfawk pointlm.dbfawk featnames.dbfawk edge.dbfawk
         cousub.dbfawk cousub00.dbfawk areawater.dbfawk arealm.dbfawk
Log Message:
Adding the dbfawk files worked on by Richard Polivka, N6NKO, Craig
Anderson, N6YXK, and Dale Seaburg, KG5LT, which help to nicely
render 2008 Tiger Shapeline files.

A note from Craig about layering:

   "...use "vi" on the map_index.sys file while xastir is not running.
   Once you are editing the file, use the following 3 commands in "vi"
   to change the layers.  This assumes that, like with my xastir, new
   maps get added into the list at layer 1000.

   :g/tabblock/s/01000/00995/
   :g/pointlm/s/01000/00996/
   :g/arealm/s/01000/00997/

   (translation: global search throughout the file for lines with
   "arealm" and substitute on that line for "01000", a "00997")

   This moves the tabblock (& tabblock00) files, pointlm files, and
   arealm files down underneath the roads maps.  Otherwise the roads
   can get covered up by urban background coloring.  Or you can do
   this through the GUI interface as well."
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-- 
Curt, WE7U.				archer at eskimo dot com
http://www.eskimo.com/~archer
   Lotto:  A tax on people who are bad at math. - unknown
Windows:  Microsoft's tax on computer illiterates. - WE7U.
The world DOES revolve around me:  I picked the coordinate system!"