some documentation updates and fixes

doc/Makefile: add a rule to regenerate gf-help-full.txt
gf-help-full.txt: updated (new parse tree visualization options)
demo & cloud index: clarifications
minibar documentation: better layout on mobile devices
GF 3.4 release notes: reorganized & updated

download/release-3.4.t2t

@@ -9,21 +9,32 @@ December 2012?
 
 See the [download page http://www.grammaticalframework.org/download/index.html].
 
-==New features==
+==What's new==
 
-- New languages in the Resource Grammar Library: Japanese, Chinese
-  [more?].
- (see the [updated synopsis ../lib/doc/synopsis.html]). Improvements for other
- languages, e.g. Latvian, [more?].
-- Some new functionality in the web-based grammar editor, e.g. preliminary
-  support for public grammars.
-- A Simple Translation Tool has been added to the cloud services.
+===GF compiler and run-time library===
 - A new partial evaluator that should provide more efficient grammar
   complilation, and solve problems with stack overflows and overly long
   compilaton times for certain grammars.
+- Better visualization of parse trees (contributed by Peter Ljunglöf).
 - Various other small improvements and bug fixes.
 - [...]
 
+
+===Resource Grammar Library===
+
+- New languages in the Resource Grammar Library: Japanese, Chinese
+  [more?].
+ (see the [updated synopsis ../lib/doc/synopsis.html]).
+- Improvements for other languages, e.g. Latvian, [more?].
+
+
+===GF Cloud services===
+- A Simple Translation Tool (a bilungual document editor) has been added.
+- A syntax tree editor has been added (contributed by John J. Camilleri).
+- Some new functionality in the web-based grammar editor, e.g. preliminary
+  support for public grammars.
+
+
 --------------------
 
 [www.grammaticalframework.org http://www.grammaticalframework.org]