Update vt.py

special thanks to @kellewic for report and patch for the issue when limit reached
Update README.md

documented changes
Update vt.py
Update vt.py
Update vt.py

code optimization, block:
                  try:  
                        jdata = response.json()  
            
                  except:
                        jdata = response.json

moved to get_response, for code cleaning, and don't repead uneeded code many times, and other small changes in prints urls, now align to left, it's a bit pretty then aling th center
Update README.md

documented code cleaning/optimization
Update README.md
Update README.md
Update vt.py

key error fix
Update README.md

a bit improved readme, thanks to @urbanski
Merge remote-tracking branch 'upstream/master'

Conflicts:
	vt.py