Add App install on /opt for install script

[ivanleoncz]

Besides all job that install.sh is doing, it is necessary to install all repo content on /opt.
Uninstall option should be capable of deleting the application directory from /opt.
Right permissions should be considered, in order to allow Systemd to manage pycaptive daemon, considering pycaptive user, of course.

Options considered for the task:

• rsync (excluding possible files/directories like .git, .gitignore, etc.)
• install (must verify if it covers with directories, besides file installation)

[ivanleoncz]

Working on. Almost done. PR it's on its way, for issue and also for issue #20 .