Grade 7 doesn't exist.
Prevent too fast of click detection
Reduce size of dictionary by only including grades 1-6.
Remove click timeout in favor of plain state checking
s/fail/error in ajax call
Add a viewport tag for mobile viewing
Reword loading message
Don't use async flag on request
Put click timer back in.
Fix error when there's no kun-yomi (or on-yomi)
Revert "Put click timer back in."

This reverts commit 0a99922ef57bf1f42581faa9aec812a4141eaf3a.
Add keyboard shortcuts