Added some basic tools to get things going

Added a basic wrapper class to do query validation (in the `utils` module). Added a function to the scraper to split the incoming CSV file into smaller chunks before attempting to iterate through it row by row and shove it into Mongo. Another obvious approach would be to use the mongoimport command line tool but that may or may not do what you want it to in terms of converting the dates to actual date objects and consistently making integers, etc.