Fix documentation markdown

Github changed it's markdown parser, requiring a space between the hash and the text for headings.

docs/Acknowledgements.md

@@ -17,21 +17,21 @@ Jeff Schiller created the excellent [jGraduate](https://code.google.com/p/jgradu
 #### canvg
 Gabe Lerner's excellent [canvg](https://github.com/gabelerner/canvg) library has helped us bypass browsers' inability to save SVG files an PNGs, by first rendering SVG images in an HTML5 Canvas element.
 
-####jQuery UI
+#### jQuery UI
 
 We use [jQuery-UI](http://jqueryui.com) for making the dialog boxes (color picker, document properties) draggable, as well as for the opacity slider.
 
-####js-hotkeys
+#### js-hotkeys
 
 [js-hotkeys](https://github.com/jeresig/jquery.hotkeys) is used to bind all keyboard events in the editor.
 
-####JQuery Web Spin-Button
+#### JQuery Web Spin-Button
 
 George Adamson's [Web Spin-Button](http://www.softwareunity.com/jquery/JQuerySpinBtn) provided a starting point to implementing a cross-browser spin control in SVG-edit. A few bugs were fixed with compatibility and sent back to George for hopeful inclusion in the next version of his jQuery plugin.
 
-####SVG Icon Loader
+#### SVG Icon Loader
 Alexis Deveria's [svg-icon-loader](https://code.google.com/p/svg-icon-loader/) is used to load in all the SVG icons for the SVG-edit user interface.
 
-####Icons
+#### Icons
 
 Many of the icons used in SVG-edit come from the [Tango Desktop Project](http://tango.freedesktop.org/Tango_Desktop_Project) which are released into the public domain. We also used a couple of icons from the [Silk Icon Project](http://famfamfam.com/lab/icons/silk), which is licensed under the Creative Commons Attribution 2.5 License. Finally, some of the icons were hand-drawn (in SVG-edit itself).