Things to check in every function

[willpearse]

• Numeric and categorical data have been assigned correctly. If they've not been, then you've downloaded the data correctly. Sometimes commas are decimals...
• You've not got the unit names in the column names
• You've removed metadata from the data itself
• You've added meta-data if it's there :D
• You've used a wrapper
• You've not downloaded a file to the hard drive in a specific place (i.e., only use tempdir. but always use the wrappers)
• Go through the list of variables that are already in the database. If you think yours should be one, submit a pull request on the cleaning.R file
• gsub(" ", "_", species) !!!
• um isn't a unit; use µm (copy from here if you need to)
• Authors have given permission to use data