Folder restructuring; added namespacing

We have updated the function names across the board to be more descriptive of that function's purpose. This allows you to more easily scan the list of files inside a folder and know what you're able to do.

We've moved away from function prefixing (s or wd_s_) as a means to avoid function naming collions and have adopted a more modern approach. You can find more information (Highly recommended reading) about PHP namespaces at Sal Ferrarello's blog here and here.