add pyHook into environment of README
add screenshot in README
Change human readable date format to YYYY-MM-DD

In functionality 'copy current date time into clipboard'
Change human readable date format to YYYY-MM-DD

In functionality 'copy current date time into clipboard'
Merge branch 'master' into dev

* master:
  Change human readable date format to YYYY-MM-DD
  add screenshot in README
  add pyHook into environment of README

Conflicts:
	README.md