Add wrap_read
Using wrap_read from utils to read stdin
Remove unused `sys` module
Update ChangeLog for issue #45
Merge pull request #46 from Alir3z4/fix-#45-does-not-accept-standard-input-when-running-under-python-3

Fix #45 does not accept standard input when running under python 3
Fixes #45

Thanks to:
* Mark Blakeney @bulletmark
* @djr7C4
* @willemw12