Fixed some whitespacing
Do not delete downloaded image builder on a regular clean. Added distclean target which deletes the downloaded file and the created files folder
Force deletion of files, so the make file does not Error on missing files.
Do not attempt to download the imagebuilder file if it is already present
Only download board if it is not present yet.
Removed WGET variable since it is not used anywhere anymore.
Target checks if file is there already.
Renamed some variables.
Removed target that was not used anywhere
Removed obsolete target.
Reformatted some comments.
Update README.md

with cleanup section
Raised version

 to PBX_auto_Image_2.2
Merge pull request #9 from stylesuxx/AA-with-installer

Cleanup, and more descriptive variables.