Removes mashape and bitdeli badges.
Ignore idea artifacts.
Adds upgrade notice to install and selfupdate scripts.
add waffle.io badge
Merge pull request #287 from waffle-iron/master

waffle.io Badge
Moves Waffle badge beneath heading.
Revert "Adds upgrade notice to install and selfupdate scripts."

This reverts commit ac63446057cfe81e31a4f2724e7232c020d60f11.
Delays upgrade notification until first command typed.
Bolster tests and accommodate explicit selfupdate.
Tweak wording and space in selfupdate prompt.
Moves contrib folder to bin.
Fixes refresh of candidate directories on selfupdate.
Update version of production to 2.1.0