add gSettings support; implement issue #10: Remember window position

data/com.github.ronnydo.colorpicker.appdata.xml

@@ -7,11 +7,12 @@
   <name>Color Picker</name>
   <summary>The most intuitive Color Picker to speed up your workflow.</summary>
   <description>
-    <p>One Color Picker to rule them all! No overhelming menus and settings. Just a dialog with all the features you'll need:</p>
+    <p>One Color Picker to rule them all! No overhelming menus or settings. An easy tool with the features you need.</p>
+    <p>Features:</p>
      <ul>
        <li>Pick a color</li>
-       <li>Choose between multiple <b>Color Formats</b></li>
-       <li>Let the <b>Color History</b> remember your last colors</li>
+       <li>Choose between multiple Color Formats</li>
+       <li>Let the Color History remember your last colors</li>
     </ul>
   </description>
   <provides>

data/com.github.ronnydo.colorpicker.gschema.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<schemalist>
+    <schema path="/com/github/ronnydo/colorpicker/"
+    id="com.github.ronnydo.colorpicker"
+    gettext-domain="com.github.ronnydo.colorpicker">
+        <key name="window-x" type="i">
+            <default>-1</default>
+            <summary>Most recent x position of app window</summary>
+            <description>Most recent x position of app window</description>
+        </key>
+        <key name="window-y" type="i">
+            <default>-1</default>
+            <summary>Most recent y position of app window</summary>
+            <description>Most recent y position of app window</description>
+        </key>
+    </schema>
+</schemalist>

data/meson.build

@@ -7,6 +7,11 @@ foreach i : icon_sizes
     )
 endforeach
 
+install_data(
+    meson.project_name() + '.gschema.xml',
+    install_dir: join_paths(get_option('datadir'), 'glib-2.0', 'schemas')
+)
+
 install_data(
     meson.project_name() + '.desktop',
     install_dir: join_paths(get_option('datadir'), 'applications')