Add git add and ANSI output to gencommit.sh

Usually you want to `git add` when you run gencommit.sh, so that has
been added.

Also, add ANSI output because I like to see what we're generating while
in the terminal.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

tools/gencommit.sh

@@ -5,4 +5,7 @@ cd "$here/.."
 
 echo "Generating examples/commithash.svg"
 python3 -m colorhash "$(git rev-parse HEAD)" --input-type hash --hash sha1 --output-type svg --out examples/commithash.svg
+git add examples/commithash.svg
 
+# Also print the ANSI version to the command line
+python3 -m colorhash "$(git rev-parse HEAD)" --input-type hash --hash sha1