Minor patch to set the autoplay attribute on the video tag when media is initially attached to the element. This fixes a bug for Chrome on Android where a call to play() prior to the media being ready to play through caused only a single frame to be displayed.

The rtc-attach package no longer directly modifies the inline style tag of the render target element, rather it sets a data-mirrored attribute so that how this is handled within an application can be left to CSS.

Allow the target element that the stream will be attached to, to be specified by either the el option or the target option.