Various tweaks to the site

Moved the content of gallery posts to the top and the gallery after
Modified the feed content to include galleries, images and videos where required
Removed the Gist plugin
Added category page for Memories
Added redirects for pages that have lost their comments
  - My Language Challenge
  - Rosie & George Playing on the Bed
Added new categories - Technology, Active/Outdoors, Challenges
Moved Jekyll posts over to Technology category
Moved Epic Quest posts to Challenges category
Moved Half Marathon posts to Challenges category
Moved 'Why I Joined a Running Club' to Active/Outdoors category
Added series pages
Added series descriptions to all series
Fixed styling of menus to suit revised menu items
Changed Pygments Colour Scheme

Added the Pygments Solarized colour scheme for code highlighted sections
Updated Gruntfile.js to use the new colour scheme
Removed the height definition for sub menu links (ul ul a) to improve the
look of the menu
New Post: Tweaking Jekyll to Suit My Needs