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/format-justify-center-symbolic.svg

@@ -0,0 +1,32 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg xmlns:cc='http://creativecommons.org/ns#' xmlns:svg='http://www.w3.org/2000/svg' xmlns:inkscape='http://www.inkscape.org/namespaces/inkscape' id='svg7384' xmlns:sodipodi='http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd' version='1.1' inkscape:version='0.47 r22583' height='16' sodipodi:docname='format-justify-center-symbolic.svg' 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'>
+  <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>
+  <sodipodi:namedview inkscape:cy='-2.68007' inkscape:current-layer='layer9' inkscape:window-width='1310' pagecolor='#555753' showborder='false' showguides='true' inkscape:snap-nodes='false' objecttolerance='10' showgrid='false' inkscape:object-nodes='true' inkscape:pageshadow='2' inkscape:guide-bbox='true' inkscape:window-x='92' inkscape:snap-bbox='true' bordercolor='#666666' id='namedview88' inkscape:window-maximized='0' inkscape:snap-global='true' inkscape:window-y='59' gridtolerance='10' inkscape:zoom='2' inkscape:window-height='690' borderopacity='1' guidetolerance='10' inkscape:cx='74.003912' inkscape:bbox-paths='false' inkscape:snap-grids='true' inkscape:pageopacity='1' inkscape:snap-to-guides='true'>
+    <inkscape:grid visible='true' spacingx='1px' type='xygrid' spacingy='1px' id='grid4866' empspacing='2' enabled='true' snapvisiblegridlinesonly='true'/>
+  </sodipodi:namedview>
+  <title id='title9167'>Gnome Symbolic Icon Theme</title>
+  <defs id='defs7386'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer9' inkscape:label='status' style='display:inline'>
+    
+    <rect x='105.0004' y='279.99979' id='rect3825-9-8-7-9' height='2.0002136' inkscape:label='a' style='color:#bebebe;fill:#bebebe;fill-opacity:1;stroke:none;stroke-width:1;marker:none;visibility:visible;display:inline;overflow:visible' width='7.9996052'/>
+    <rect x='104.0004' y='283.99979' id='rect3825-9-8-7-8-4' height='2.0002136' inkscape:label='a' style='color:#bebebe;fill:#bebebe;fill-opacity:1;stroke:none;stroke-width:1;marker:none;visibility:visible;display:inline;overflow:visible' width='9.9996014'/>
+    <rect x='107.0004' y='287.99979' id='rect3825-9-8-7-8-9-9' height='2.0002136' inkscape:label='a' style='color:#bebebe;fill:#bebebe;fill-opacity:1;stroke:none;stroke-width:1;marker:none;visibility:visible;display:inline;overflow:visible' width='3.9996014'/>
+  </g>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer10' inkscape:label='devices'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer11' inkscape:label='apps'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer12' inkscape:label='actions'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer13' inkscape:label='places'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer14' inkscape:label='mimetypes'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='layer15' inkscape:label='emblems' style='display:inline'/>
+  <g transform='translate(-101.0002,-277)' inkscape:groupmode='layer' id='g4953' inkscape:label='categories' style='display:inline'/>
+</svg>