Update data_catalog.md
Update project_dir.md
Update data_catalog.md
Merge pull request #7 from znmeb/patch-1

Update data_catalog.md
fun with merge conflicts
Merge branch 'master' of https://github.com/CodeForPortland/project-index
cleaning up data links etc
Merge pull request #9 from CodeForPortland/mele

cleaning up data links etc
Update README.md
Added a link to the 'whatsmydistrict' app

Just enter the default '560 E. Third Street' to see what it does.
Create national_data_journalism_projects.md
fix Markdown for table
Merge remote-tracking branch 'origin/patch-1'
Merge remote-tracking branch 'origin/patch-3'