Revert import changes from https://github.com/DesertBot/DesertBot/commit/6fd08d619d53e8b0f7d765238586f243c0835caf
The package structure was decided on by Hubbe and myself and was done so the modules and the core have consistent import structure. You might not need to specify the package in the core, but in a module you do have to. Doing imports differently in different places just makes things confusing. (see txircd as an example).

Also, in the future please refrain from making big structure changes like this before discussing it first.