Revert: Make sure component is still mounted before setting state #67
Revert "Add test to make sure state isn't set on unmounted components #67"

This reverts commit 4343725d399c30d15994b2f4ebfa1d99f4588072.
Add test to make sure unmounting a component doesn't throw exceptions #67
Ignore any XHR callbacks after unmounting #67
Bump minor version #67

Functionality was added previously but only the patch version was
increased then