Update README.md
Update README.md
Update README.md
Update README.md
Add Makefile.
Fix Makefile variables, add comments, edit layout and add uartstdio to builds.
Makefile spacing edits.
Improve Makefile formating and variable assignment, add cleanup before all build.
Update README.md to remove TivaWare sources and libraries from within project folder.
Add Makefile outputs descriptions to README.md.