new package: gtk-2.24.28 and gtk-3.14.13

Closes #1 -> NSIS installer with long PATH names
Closes #2 -> libxml++ added

New packages added: json-glib, libxml++ and libxslt
Several packages saw a version bump.
For now I am sticking with gtk-3.14, since gtk-3.16 introduces a mandatory dependency on OpenGL through libepoxy which I still need to figure out...

gtk-nsis-pack/share/icons/Adwaita/scalable/actions/media-playback-pause-symbolic.svg

@@ -0,0 +1,29 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg xmlns:cc='http://creativecommons.org/ns#' xmlns:inkscape='http://www.inkscape.org/namespaces/inkscape' xmlns:svg='http://www.w3.org/2000/svg' id='svg7384' version='1.1' height='16' xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#' xmlns='http://www.w3.org/2000/svg' width='16'>
+  <title id='title9167'>Gnome Symbolic Icon Theme</title>
+  <metadata id='metadata90'>
+    <rdf:RDF>
+      <cc:Work rdf:about=''>
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type rdf:resource='http://purl.org/dc/dcmitype/StillImage'/>
+        <dc:title>Gnome Symbolic Icon Theme</dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs id='defs7386'/>
+  <g transform='translate(-159.99995,-496)' id='layer9' style='display:inline'/>
+  <g transform='translate(-159.99995,-496)' id='layer10'/>
+  <g transform='translate(-159.99995,-496)' id='layer11'/>
+  <g transform='translate(-159.99995,-496)' id='layer12'>
+    
+    <g transform='translate(39.99995,9)' id='g3221'>
+      <path inkscape:connector-curvature='0' d='m 124,491 0,8 3,0 0,-8 -3,0 z' id='path3807-1-1-5-8-6' style='font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0pt;text-align:start;text-decoration:none;line-height:normal;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;text-anchor:start;color:#bebebe;fill:#bebebe;fill-opacity:1;stroke:none;stroke-width:2;marker:none;visibility:visible;display:inline;overflow:visible;font-family:Andale Mono'/>
+      <path inkscape:connector-curvature='0' d='m 129,491 0,8 3,0 0,-8 -3,0 z' id='path3807-1-1-5-8-6-3' style='font-size:medium;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-indent:0pt;text-align:start;text-decoration:none;line-height:normal;letter-spacing:normal;word-spacing:normal;text-transform:none;direction:ltr;text-anchor:start;color:#bebebe;fill:#bebebe;fill-opacity:1;stroke:none;stroke-width:2;marker:none;visibility:visible;display:inline;overflow:visible;font-family:Andale Mono'/>
+    </g>
+  </g>
+  <g transform='translate(-159.99995,-496)' id='layer13'/>
+  <g transform='translate(-159.99995,-496)' id='layer14'/>
+  <g transform='translate(-159.99995,-496)' id='layer15'/>
+</svg>