cleanFeatureDF: Clean up feature data in preparation for saving
In ConvergenceDA/visdom: R package for energy data analytics

This function renames data columns for export via fixNames(), converts factors into characters, and checks for id and zip5 colums

1	cleanFeatureDF(features, checkId = TRUE, checkGeo = TRUE)

`features`	The data frame of feature to be cleaned up
`checkId`	boolean indicating whether to enforce a check for an id column with an error message. This should be true when exporting features or other id matched data and false otherwise.
`checkGeo`	boolean indicating whether to enforce a check zip5 columns with a warning message. This should be true when exporting features that will be mapped.