Replace all hardcoded urls to plasma-phone.org

overview.html

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                             <h2 style="text-align: center;">KDE Plasma/Qt Technology</h2>
                             <p style="text-align: center;">Using the multi-platform toolkit Qt, the flexible extensions of KDE Frameworks plus the power of Plasma Shell, Plasma Mobile is built with technology which feels equally at home on the desktop and mobile devices.</p>
-                            <img class=" size-full wp-image-276 aligncenter" src="http://plasma-phone.org/wp-content/uploads/hero.jpg" alt="hero" width="2000" height="1200" /></div>
+                            <img class=" size-full wp-image-276 aligncenter" src="/img/hero.jpg" alt="hero" width="2000" height="1200" /></div>
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                         <div id="panel-269-1-0-0" class="so-panel widget widget_black-studio-tinymce widget_black_studio_tinymce panel-first-child panel-last-child" data-index="1">
                             <div class="clear-img panel-widget-style panel-widget-style-for-269-1-0-0">
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-                                    <p><img class="alignnone size-full wp-image-277" src="http://plasma-phone.org/wp-content/uploads/wayland.png" alt="wayland" width="600" height="500" /></p>
+                                    <p><img class="alignnone size-full wp-image-277" src="/img/wayland.png" alt="wayland" width="600" height="500" /></p>
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                         <div id="panel-269-2-1-0" class="so-panel widget widget_black-studio-tinymce widget_black_studio_tinymce panel-first-child panel-last-child" data-index="4">
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-                                    <p><img class="alignnone size-full wp-image-278" src="http://plasma-phone.org/wp-content/uploads/telephony.png" alt="telephony" width="840" height="1000" /></p>
+                                    <p><img class="alignnone size-full wp-image-278" src="/img/telephony.png" alt="telephony" width="840" height="1000" /></p>
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                         <div id="panel-269-3-0-0" class="so-panel widget widget_black-studio-tinymce widget_black_studio_tinymce panel-first-child panel-last-child" data-index="5">
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-                                    <p><img class="alignnone size-full wp-image-275" src="http://plasma-phone.org/wp-content/uploads/schemes.png" alt="schemes" width="800" height="600" /></p>
+                                    <p><img class="alignnone size-full wp-image-275" src="/img/schemes.png" alt="schemes" width="800" height="600" /></p>
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