Replaced old cl_f commands with cl_i (fixes #39)
Made Python/GTK3 main file executable (fixes #38)
Python assistants: fix some pep8 problems, remove unused imports, etc.
Py3 compatibility for gtk3 assistant
Asking for confirmation when uploading ~: partial solution for #40
Fix PHP/lamp. Fixes #41
Add 'preserved' attribute to some arguments. This is a part of fix #221.