Update classes.json

My first try at this data format...
Update classes.json

Added other cleric domains.
Update classes.json

Added paladin oath spells
Update classes.json

missed a comma
Update classes.json

attempt at adding spells per day
Update classes.json
Update classes.json
Update classes.json

Comma catching
Update classes.json

Entered other druid spells granted by circle of land.
Update classes.json

commas!
Update classes.json
Update classes.json
Merge pull request #2 from ektogamut/patch-1

Patch 1