v2.8.2-beta.1

Changelog

This is a backport of the bugfixes in 3.0.0-beta.1 into the 2.x version without any of the PHPCSUtils changes. Because of the nature of a backport, this is a test release to make sure everything works properly before I do a proper release of 2.8.2.

• Fix comment tolerance for many sniffs (huge props to @jrfnl)
• Clean up package structure (@jrfnl also, for the most part)
• Only allow unused values in associative foreach loops with option (#167)
• Fix unused-before-used detection (#171)