[gspell] Improve a little the README

[Sébastien Wilmet <swilmet src gnome org>]

commit f75459ddf6f19f7c1e8fb2a986e5f2eeeb73f7dd
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Nov 2 12:25:30 2017 +0100

    Improve a little the README

 README |   16 +++++++++-------
 1 files changed, 9 insertions(+), 7 deletions(-)
---
diff --git a/README b/README
index b8bd86f..d5b1f46 100644
--- a/README
+++ b/README
@@ -3,7 +3,7 @@ gspell - a spell-checking library for GTK+ applications
 
 This is version 1.6.1 of gspell.
 
-gspell provides a flexible API to add spell checking to a GTK+ application.
+gspell provides a flexible API to add spell-checking to a GTK+ application.
 
 The gspell library is free software and is released under the terms of the GNU
 LGPL version 2.1 or later. See the file 'COPYING' for more information.
@@ -50,10 +50,10 @@ See also:
     https://fedoraproject.org/wiki/Releases/FeatureDictionary
     https://wiki.ubuntu.com/ConsolidateSpellingLibs
 
-Installation from a tarball
----------------------------
+Installation
+------------
 
-Simple install procedure:
+Simple install procedure from a tarball:
 
   $ ./configure
   $ make
@@ -62,10 +62,12 @@ Simple install procedure:
 
 See the file 'INSTALL' for more detailed information.
 
-Installation from Git
----------------------
+From the Git repository, the 'configure' script and the 'INSTALL' file are not
+yet generated, so you need to run 'autogen.sh' instead, which takes the same
+arguments as 'configure'.
 
-It is recommended to use Jhbuild:
+To build the latest version of gspell plus its dependencies from Git, Jhbuild
+is recommended:
 
     https://wiki.gnome.org/Projects/Jhbuild