More verbose install script and pretty prints

I wanted to have prettier and more robust `install.sh` scripts. For that I made the main install script cleaner and more verbose and encapsulated the prints used in `script/bootstrap` along with some others for intermediate steps in `bin/pprint`. 

To have as reference, I also updated homebrew and ruby install scripts with pretty prints and redirecting output to `*.dot.log` files. that will be listed at the end of the install script in case there were any problem.