I did it on a MAC and flashed the firmware by double-clicking on the update-firmware.command file that was included in the firmware update package (left in the src directory as downloaded).
This ran the following command:
Danny-Gabai:~ danny.gabai$ /Users/danny.gabai/Downloads/ansible-1.6.0/src/update-firmware.command ; exit;
When I run the 1s -1h command in the directory I get:
Danny-Gabai:src danny.gabai$ ls -lh
total 480
-rwxr-xr-x@ 1 danny.gabai staff 2.8K Apr 17 15:06 Makefile
-rwxr-xr-x@ 1 danny.gabai staff 41K Apr 17 15:06 ansible_arc.c
-rwxr-xr-x@ 1 danny.gabai staff 1.8K Apr 17 15:06 ansible_arc.h
-rwxr-xr-x@ 1 danny.gabai staff 77K Apr 17 15:06 ansible_grid.c
-rwxr-xr-x@ 1 danny.gabai staff 2.8K Apr 17 15:06 ansible_grid.h
-rwxr-xr-x@ 1 danny.gabai staff 45K Apr 17 15:06 ansible_midi.c
-rwxr-xr-x@ 1 danny.gabai staff 1.8K Apr 17 15:06 ansible_midi.h
-rwxr-xr-x@ 1 danny.gabai staff 4.4K Apr 17 15:06 ansible_tt.c
-rwxr-xr-x@ 1 danny.gabai staff 444B Apr 17 15:06 ansible_tt.h
-rwxr-xr-x@ 1 danny.gabai staff 8.0K Apr 17 15:06 config.mk
-rwxr-xr-x@ 1 danny.gabai staff 140B Apr 17 15:06 flash.sh
-rwxr-xr-x@ 1 danny.gabai staff 12K Apr 17 15:06 main.c
-rwxr-xr-x@ 1 danny.gabai staff 1.4K Apr 17 15:06 main.h
-rwxr-xr-x@ 1 danny.gabai staff 172B Apr 17 15:06 update-firmware.command