markdown version of advance materials, images in the images/advance directory
advance allchapters html
adding link to cc0 license, closes #99
set prose rooturl
replacing contents and images of walking papers to field papers
replaced walkingpapers plugin to fieldpapers
Update 0200-12-31-beginner.md

Updated german beginner page - "Straßenumfrage" is "street poll", not "street survey", which translates better to "Straßenkartierung".
Merge pull request #128 from tilmanb/patch-1

Update 0200-12-31-beginner.md
Link to Daniel's guide

I'm not sure if the plan is to merge Daniel's guide in here, or have it as another file in this repo, but I guess at least linking it would be a good first step
Fix broken "contribute" link (fix #127)
Merge pull request #126 from maning/fieldpapers

Replacing contents and images of walking papers to field papers
Merge pull request #117 from maning/advance_images

Markdown of Advance materials including images.
changing 'advance' to 'advanced' in all cases as it makes more sense
updated first chapter and resized images
mistakenly forgot to add the new files
updating with new images from osm website, and using iD instead of potlatch 2
updating for changes and removing unnecessary material (preferences & plugins)
Merge pull request #131 from jeffhaack/gh-pages

Renaming advanced sections and updating beginner chapters in english
adding correct sample.osm location
updating gps chapter and fixing missing images