Adding rake to execute the tests on the project.

Signed-off-by: Esteban Torres <me@estebantorr.es>
Removed unnecessary code from the makefile.

Signed-off-by: Esteban Torres <me@estebantorr.es>
Modified the script to use xctool

Signed-off-by: Esteban Torres <me@estebantorr.es>
Changes to the test shared scheme.

Signed-off-by: Esteban Torres <me@estebantorr.es>