Closes #354 - Added Elixir 1.7 warning (#355)
Closes #354 - Added Elixir 1.7 warning (#355)

* Added Elixir1.7 warning

* Changed if statement to smart regex and used sysytem version

* Changed if statement to smart regex and used sysytem version

* Changed text and regex to only 1.7 Elixir version

wende/elchemy,wende/elchemy