GUI tutorial, site redesign, oh so many bug fixes

Features added:

• GUI tutorial written (still missing the "testing" portion of the tutorial) - #122
• Network tutorial moved out of drafts #109
• Complete site redesign
  • updated Mynt version #106
  • switched to bootstrap
  • added 404 page #103
• Tested and updated versions of dependencies within requirements.txt - #110 #106

Bugs fixed:

• [begin] rewrite of Windows setup - #125 #130 #25 #66
• [begin] update Mac & XCode setup - #107
• [begin] fixed Linux-flavor & Mac setup for virtualenvwrapper - #124 #39 #83 #141
• [scrape] XPaths updated - #140 #143
• [website] typos, borked links