[chronojump] Added material design forward/backward images

[Xavier de Blas <xaviblas src gnome org>]

commit 11b9a15989d45d6a7d5944da8bdcf2afe4f6d8d9
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Aug 8 14:14:55 2019 +0200

    Added material design forward/backward images

 images/md/baseline_arrow_backward_blue_24dp.png      | Bin 0 -> 2289 bytes
 images/md/baseline_arrow_forward_blue_24dp.png       | Bin 0 -> 2192 bytes
 images/md/baseline_arrow_forward_red_24dp.png        | Bin 0 -> 3118 bytes
 images/md/baseline_arrow_forward_red_yellow_24dp.png | Bin 0 -> 3670 bytes
 src/Makefile.am                                      |   3 +++
 src/constants.cs                                     |   4 ++++
 6 files changed, 7 insertions(+)
---
diff --git a/images/md/baseline_arrow_backward_blue_24dp.png b/images/md/baseline_arrow_backward_blue_24dp.png
new file mode 100644
index 00000000..a601b360
Binary files /dev/null and b/images/md/baseline_arrow_backward_blue_24dp.png differ
diff --git a/images/md/baseline_arrow_forward_blue_24dp.png b/images/md/baseline_arrow_forward_blue_24dp.png
new file mode 100644
index 00000000..e0a17a36
Binary files /dev/null and b/images/md/baseline_arrow_forward_blue_24dp.png differ
diff --git a/images/md/baseline_arrow_forward_red_24dp.png b/images/md/baseline_arrow_forward_red_24dp.png
new file mode 100644
index 00000000..a50daeae
Binary files /dev/null and b/images/md/baseline_arrow_forward_red_24dp.png differ
diff --git a/images/md/baseline_arrow_forward_red_yellow_24dp.png 
b/images/md/baseline_arrow_forward_red_yellow_24dp.png
new file mode 100644
index 00000000..ce1cd2f6
Binary files /dev/null and b/images/md/baseline_arrow_forward_red_yellow_24dp.png differ
diff --git a/src/Makefile.am b/src/Makefile.am
index d3a24f15..ab19d0c2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -459,6 +459,9 @@ RESOURCES = \
        ../images/md/ic_fitness_center_blue_24dp_1x.png,image_exercise.png \
        ../images/md/ic_keyboard_arrow_up_blue_24dp_1x.png,image_up.png \
        ../images/md/ic_keyboard_arrow_down_blue_24dp_1x.png,image_down.png \
+       ../images/md/baseline_arrow_forward_blue_24dp.png,arrow_forward.png \
+       ../images/md/baseline_arrow_backward_blue_24dp.png,arrow_backward.png \
+       ../images/md/baseline_arrow_forward_red_yellow_24dp.png,arrow_forward_emphasis.png \
        ../images/md/inertial_rolled.png,inertial_rolled.png \
        ../images/md/inertial_half_rolled.png,inertial_half_rolled.png \
        ../images/md/inertial_extended.png,inertial_extended.png \
diff --git a/src/constants.cs b/src/constants.cs
index 989bb2be..eac40a4f 100644
--- a/src/constants.cs
+++ b/src/constants.cs
@@ -1010,6 +1010,10 @@ public class Constants
        public static string Invert = "Invert";
        public static string Selected = "Selected";
 
+       public static string FileNameArrowForward = "arrow_forward.png";
+       public static string FileNameArrowBackward = "arrow_backward.png";
+       public static string FileNameArrowForwardEmphasis = "arrow_forward_emphasis.png";
+
        /*
         * encoder storage
         * chronojump / encoder / sessionID / data