Update 0500-11-16-remote.md

Test to embed hackpad document for collaborative translation
Typo fix line 26 addind -> adding

Fixes a small typo on the contribution page.
Merge pull request #258 from bgirardot/patch-1

Typo fix line 26 addind -> adding
Merge pull request #257 from althio/patch-3

Update 0500-11-16-remote.md - embedded hackpad
Update 0200-12-28-start-josm.md

fix broken link sample.osm
+ typo
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages