Index

- Wrote ```filter_by``` and ```get_by```
- Currently ```filter_by``` takes in kwargs and only allows for equals comparison (i.e. ```LiteDriver.filter_by(is_active=True, first_name='Bob'```)
- ```get_by``` calls ```filter_by``` and ensures that there is only one element returned
- Indexing created a sorted set unless we have a ```Text``` column.  We then created a sorted set and also a hash containing a list of pks associated with a certain value