condition on author

Do not show the author text if there is no author in the YAML #9
remove link to geojson
close #12
set kramdown as builder
refactor
modernize permalink
fix misspelling
set strong style

close #14
playground page
add link to the playgrounds
map style
fix menu over map
figcaption style
add comments
add some text

explaining what is this map
add author in YAML

close #9
add inuitcss base.images
place jQuery call at bottom
add link to geojson in YAML
rename layout file
rename post layout