data validation for each tab

[aammd]

• check column names
• are data values out of range -- loo large or too many very small
• are any columns filled with NAs
• is the site variable missing any values
• does the site value contain all the same word
• are any observational rows filled with NAs

[aammd]

create functions that check each of these

[aammd]

Confirm that no insects are duplicated in a wide insect format