Add PDF generation to docs target

Cleaned  up   some  syntax   anomolies  because   of  the   switch  to
asciidoctor. Minor text tweaks to improve PDF pagination. Reduced HTML
master font size to 80% for better web rendering.

Removed references to KVASD from User Guide.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6142 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

doc/user_guide/tutorial-example1.adoc

@@ -12,7 +12,7 @@ those shown in the screen shot below.
 something similar to the to the following screen shot:
 
 [[X12]]
-image::images/main-ui-1.6.png[align="center",alt="Main UI and Wide Graph"]
+image::main-ui-1.6.png[align="center",alt="Main UI and Wide Graph"]
 
 .Decoding Overview
 
@@ -28,7 +28,7 @@ Tx frequency.
 Seven JT9 signals are present in the example file, all decodable.
 When this file was recorded KF4RWA was finishing a QSO with K1JT.
 Since the green marker was placed at his audio frequency, 1224 Hz, his
-message ``K1JT KF4RWA 73'' is decoded first and appears in the *Rx
+message "`K1JT KF4RWA 73`" is decoded first and appears in the *Rx
 Frequency* window. The *Band Activity* window shows this message plus
 all decodes at other frequencies.  By default lines containing CQ are
 highlighted in green, and lines with *My Call* (in this case K1JT) in
@@ -56,14 +56,14 @@ will transmit in the proper (odd or even) minutes.
 ** The Rx and Tx frequency markers are moved to the frequency of the
 CQing station.
 
-** The *Gen Msg* (``generated message'') radio button at bottom right 
+** The *Gen Msg* ("`generated message`") radio button at bottom right 
 of the main window is selected.
 
 ** If you had checked *Double-click on call sets Tx Enable* on the
 *Setup* menu, *Enable Tx* would be activated and a transmission would
 start automatically at the proper time.
 
-- Double-click on the decoded message ``K1JT N5KDV EM41'',
+- Double-click on the decoded message "`K1JT N5KDV EM41`",
 highlighted in red.  Results will be similar to those in the
 previous step, except the Tx frequency (red marker) is not
 moved.  Such messages are usually in response to your own CQ, or from
@@ -75,8 +75,8 @@ line you can cause both Tx and Rx frequencies to be moved.  This
 behavior can also be forced by checking *Lock Tx=Rx*.
 
 - Double-click on the message from KF4RWA in either window. He is
-sending ``73'' to K1JT, signifying that the QSO is over.  Most likely
-you want to send 73 to him, so the message ``KF4RWA K1JT 73'' is
+sending "`73`" to K1JT, signifying that the QSO is over.  Most likely
+you want to send 73 to him, so the message "`KF4RWA K1JT 73`" is
 automatically generated and selected for your next transmission.
 (Alternatively, you might choose to send a free text message or to
 call CQ again.)