[latexila] Improve the Installation section in the README file

[Sébastien Wilmet <swilmet src gnome org>]

commit 537b3c7a79427bcae3b67d11647f99d87f05083e
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Nov 2 10:55:20 2017 +0100

    Improve the Installation section in the README file
    
    And move Jhbuild recommendation to the README file.

 HACKING |    5 -----
 README  |   16 ++++++++++------
 2 files changed, 10 insertions(+), 11 deletions(-)
---
diff --git a/HACKING b/HACKING
index 3b47b19..7dffe09 100644
--- a/HACKING
+++ b/HACKING
@@ -9,11 +9,6 @@ messages:
     https://wiki.gnome.org/Git/WorkingWithPatches
     https://wiki.gnome.org/Git/CommitMessages
 
-An easy way to build LaTeXila and its dependencies is to use jhbuild
-(gnome-world moduleset). Example of a jhbuildrc file for LaTeXila:
-
-    https://people.gnome.org/~swilmet/latexila/jhbuildrc
-
 Code conventions
 ----------------
 
diff --git a/README b/README
index 8ada680..f1ee4a3 100644
--- a/README
+++ b/README
@@ -32,10 +32,10 @@ And for building the sources:
 If you are installing LaTeXila from a tarball, you don't have to install Vala
 because the C code is already generated.
 
-Installation from a tarball
----------------------------
+Installation
+------------
 
-Simple install procedure:
+Simple install procedure from a tarball:
 
   $ ./configure
   $ make
@@ -44,12 +44,16 @@ 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 LaTeXila plus its dependencies from Git, Jhbuild
+is recommended. LaTeXila is in the gnome-world moduleset. An example of a
+jhbuildrc file for LaTeXila is provided:
 
     https://wiki.gnome.org/Projects/Jhbuild
+    https://people.gnome.org/~swilmet/latexila/jhbuildrc
 
 How to contribute
 -----------------