[pangomm] Convert README to README.md

[Kjell Ahlstedt <kjellahl src gnome org>]

commit dcc05d8a0ffa4ce257e0196a857a3a8db11a1de5
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Sep 12 16:56:55 2022 +0200

    Convert README to README.md

 README => README.md | 37 ++++++++++++++++++++++++++++---------
 1 file changed, 28 insertions(+), 9 deletions(-)
---
diff --git a/README b/README.md
similarity index 90%
rename from README
rename to README.md
index c41fec2..26109b9 100644
--- a/README
+++ b/README.md
@@ -1,3 +1,4 @@
+# pangomm
 This is pangomm, a C++ API for Pango. 
 See http://www.gtkmm.org/
 
@@ -13,8 +14,10 @@ See README.win32
 ## Building from a release tarball
 
 Extract the tarball and go to the extracted directory:
+```
   $ tar xf pangomm-@PANGOMM_VERSION  tar xz
   $ cd pangomm-@PANGOMM_VERSION@
+```
 
 It's easiest to build with Meson, if the tarball was made with Meson,
 and to build with Autotools, if the tarball was made with Autotools.
@@ -28,36 +31,45 @@ of untracked/.
 
 Don't call the builddir 'build'. There is a directory called 'build' with
 files used by Autotools.
-
+```
   $ meson --prefix /some_directory --libdir lib your_builddir .
   $ cd your_builddir
-
+```
 If the tarball was made with Autotools, you must enable maintainer-mode:
+```
   $ meson configure -Dmaintainer-mode=true
+```
 
 Then, regardless of how the tarball was made:
+```
   $ ninja
   $ ninja install
-
+```
 ### Building from a tarball with Autotools
 
 If the tarball was made with Autotools:
+```
   $ ./configure --prefix=/some_directory
+```
 If the tarball was made with Meson, you must enable maintainer-mode:
+```
   $ ./autogen.sh --prefix=/some_directory
+```
 
 Then, regardless of how the tarball was made:
+```
   $ make
   $ make install
-
+```
 ## Building from git
 
 Building from git can be difficult so you should prefer building from
 a release tarball unless you need to work on the pangomm code itself.
 
 jhbuild can be a good help
-  https://gitlab.gnome.org/GNOME/jhbuild
-  https://wiki.gnome.org/Projects/Jhbuild
+- https://gitlab.gnome.org/GNOME/jhbuild
+- https://wiki.gnome.org/Projects/Jhbuild
+- https://gnome.pages.gitlab.gnome.org/jhbuild
 
 ### Building from git with Meson
 
@@ -65,20 +77,27 @@ Maintainer-mode is enabled by default when you build from a git clone.
 
 Don't call the builddir 'build'. There is a directory called 'build' with
 files used by Autotools.
-
+```
   $ meson --prefix /some_directory --libdir lib your_builddir .
   $ cd your_builddir
   $ ninja
   $ ninja install
+```
 You can create a tarball like so:
+```
   $ ninja dist
-
+```
 ### Building from git with Autotools
-
+```
   $ ./autogen.sh --prefix=/some_directory
   $ make
   $ make install
+```
 You can create a tarball like so:
+```
   $ make distcheck
+```
 or
+```
   $ make dist
+```