doc addition

[Bertalan Fodor]

In section 13.6 Editor support I propose the following modifications.

--------------

- Because LilyPondTool has the most most features and generally (at 
least on Windows platforms) it requires almost no configuration, I would 
list it as the first.
- Remove the jEdit part and write the following instead:

LilyPondTool
Created as a plugin for the jEdit (http://www.jedit.org) text editor 
LilyPondTool is the most feature-rich text-based tool for editing 
LilyPond scores. Its features include a Document Wizard with lyrics 
support to set up documents easier, embedded PDF viewer with advanced 
point-and-click support (e.g. ruler), structure browser with code 
folding, instant parser that finds syntax errors while typing, automatic 
code completion for commands and tweaking properties, and many more. The 
simple way of installation is from jEdit, choosing Plugins > Plugin 
Manager and checking LilyPondTool from the install tab. However, most 
times jEdit plugin repository will not contain the latest version, so 
you should check LilyPondTool's official page 
(http://lilypondtool.organum.hu) for the latest version and its 
installation instructions. Screenshots and Flash demonstrations are also 
available at that site.

- The part "All these editors can be made to jump into the input 
file..." is confusing, because LilyPondTool can not be made to jump into 
the input file, but jumps out of the box. So I would write

Using these editors you can jump into the input file to the source of a 
symbol in the graphical output. LilyPondTool provides this out-of-the 
box, using its embedded PDF viewer, but Emacs and Vim needs special 
configuration. See Point and click 
<http://lilypond.org/doc/v2.10/Documentation/user/lilypond/Point-and-click#Point-and-click>.

--------------

Bert