Updated example makefile
 *  Make would fail due to missing build directory. Now it doesn't try to delete build/
Updated example
 *  Moved existing example to its own directory, with the intention of adding more examples
 *  Existing example uses its own .yml file instead of one of the files in targets/.
Added another example
 *  Simple makefile example, extracted from existing example
Added example
 *  Added example that uses unity test fixture
Updated examples
 *  Updated example 2 readme
 *  Broke up huge line in example 2 makefile