added a homepage to Simpoll

I tried my dirty hands at CSS and I cooked up something. Certainly not
done yet but acceptable, in the mean time :wink:
better message when webhook successfully created

Maybe this message will not sound great to the merchant but I felt it
was cool enough. In case of any trouble, CHANGE IT! Thank you
only send survey emails during weekday mornings

Research, or at least what I do, shows that we don't respond properly/at
all to emails that are sent on weekends. So I'm not sending emails on
the weekend
corrected typo
Merge branch 'master' of https://github.com/yawboakye/simpoll

Conflicts:
	app/assets/stylesheets/welcome.css.scss
	app/views/layouts/homepage.html.erb