Ability to disable Bootstrap based CSS

I noticed that your CSS is bootstrap based. I am developing bootstrap 4.0 (currently in alpha) based themes. I would like to have a feature where actually the native bootstrap classes being used and only the anspress specific loaded.

I could to this myself by compiling the less and removing the bootstrap based less files. But you put them all into one folder. Could you tell me what .less files are yours entirely and what modifications you made to the bootstrap files apart from prefixing the classes with ap-?

I could remove that prefix with little .js i guess.