Updated readme to reflect project.
Moved Makefile to example file.

The makefile for cross-compilation is now named Makefile-example. Please copy it
as Makefile and edit that to compile your builds. This will avoid the need to
edit the file everytime to point to your directories.
Merged branch 'pruning' for code reindenting.

Changes can easily be made on both branches and merge seamlessly without cause big merging conflicts.
Meh. One raspberrypi directory is enough.

Deleted rpi_cross directory for cross-compilation. I just realized that it isn't necessary to have two directories with the same code in it. I edited the Makefile in the raspberrypi directory to be able to handle whether you build on the Pi or on another platform. I am not testing the build on the Pi though. I have only done so for x86. I also added a .gitignore for the directory to ignore 'makefile'. It has higher precedence than Makefile when make looks for it, so just copy Makefile to makefile and edit it to your needs.