Fixing "directory" spelling mistake
Merge pull request #1953 from code-lever/master

Fixing "directory" spelling mistake
Add donate page
Use team gratipay link
Ease up permissions on 'looks great'. Fixes #1962
Use uuid for user key generation
Add reset button for API key
fix typo on donate page
Merge pull request #1974 from manewitz/patch-1

fix typo on donate page
Update contributing guide to explain updated PRs
add link to problem index in submission page
Merge pull request #1989 from exercism/1969-link-to-solutions

add link to problem index in submission page