adjusting caching rules

When trying to get up and running the repvious caching rules caused errors:
Invalid value for property 'caching'. It should be a string

After trying various alternatives al messages seemsed to suggest that the only valid
types were ALL, KEYS_ONLY, ROWS_ONLY, NONE. Given what was there it looked like NONE
was the desired option.
Merge pull request #96 from nathj07/schema_fix

adjusting caching rules