source install/update

[andreagalle]

Without sourcing both install and update-galledanza the changes are not effective immediately.

Have a look at:

• https://superuser.com/questions/176783/what-is-the-difference-between-executing-a-bash-script-vs-sourcing-it
• https://stackoverflow.com/questions/16011245/source-files-in-a-bash-script
• https://askubuntu.com/questions/146031/bash-alias-alias-name-should-be-a-simple-dash-not-working
• https://unix.stackexchange.com/questions/168221/are-there-problems-with-hyphens-in-functions-aliases-and-executables

to prevent collisions with similar executable files already in your PATH, producing the cannot execute binary file error:

• https://unix.stackexchange.com/questions/152561/why-does-source-give-an-error-cannot-execute-binary-file