[pan2] INSTALL file is no longer used

[Petr Kovář <pmkovar src gnome org>]

commit bb0c906a95b8aa2eda9fab5f6926129098dad7ba
Author: Petr Kovar <pknbe volny cz>
Date:   Sun Dec 3 20:47:54 2017 +0100

    INSTALL file is no longer used

 .gitignore  |    1 -
 Makefile.am |    1 -
 README      |   14 +++++++++++---
 3 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index a4e3d97..dfb5712 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,7 +20,6 @@ help/*/*.mo
 help/*/*.stamp
 help/*/index.docbook
 !help/C/index.docbook
-INSTALL
 install-sh
 m4/
 Makefile
diff --git a/Makefile.am b/Makefile.am
index 5534b60..f551cf3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -26,7 +26,6 @@ DISTCLEANFILES = \
  pan.desktop
 
 MAINTAINERCLEANFILES = \
- $(srcdir)/INSTALL \
  $(srcdir)/aclocal.m4 \
  $(srcdir)/config.guess \
  $(srcdir)/config.h.in \
diff --git a/README b/README
index 81a7af8..11897ec 100644
--- a/README
+++ b/README
@@ -116,13 +116,21 @@ THE SALES PITCH
 
 INSTALLATION
 
-    See the file 'INSTALL' for instructions.
+    Run the following command to build and install Pan configured with the
+    default options:
+
+    ./configure && make && sudo make install
+
+    When building and installing from the Git repository, run the following
+    command instead:
+
+    ./autogen.sh && make && sudo make install
 
 
 UPGRADING
 
-    Upgrading typically requires that you do the exact same procedure as
-    in the 'INSTALL' file.
+    Upgrading typically requires that you do the exact same procedure as when
+    installing Pan.
 
 
 HOW TO REPORT BUGS