Change Data Folder Name

[aloisklink]

Currently, the data folder is done by getting the name of the database without its extension, and adding .d/ndarr/ to it, ie

Database Name	Data Folder Name
example.sqlite	example.d/ndarr/

This may cause problems if there is no extension, so instead, we should change the data folder name to just be the name of the database with .d appended to it, ie

Database Name	Data Folder Name
example.sqlite	example.sqlite.d/