Started Adding information about the building process and the different make targets.
Update README.md

fixed formatting
Update README.md

Fixed formatting of the inline codes and changed some wording
added some links
Added information about Kernel config
Changed ther order of steps a little bit.
Done documenting the build process using the piratebox_feed variant
Merge branch 'feature/documentation' into development
Ignore folders created during the build process.
Fixed a typo.
We are in the right dir and do not need to change back.
Removed links, since they are in the readme.
Removed info about menu config adaptions, since they are in the readme now.
Removed info about packages that need to be placed manually, since this is now part of the readme
Removed info about building the final image, since this is now part of the readme.
Fixed some whitespacing
Switch to the AA-with-installer branch of the imagebuilder repository
Commented some of the targets
Renamed make target to comply with the rest.
Removed information about build steps, this is in the README now.