Update upstream version to 0.3.3.

Tagging 0.3.3

Update the plugin to its latest version with TNW changes on top.

Fix bug with images on the new theme.

Bump to 0.3.2

Including changelog updates

Updated to 0.3 upstream and add strict check for amp parameter.

Bump to v0.3

Latest changes on the plugin on its way to 0.3

Update changelog in wp readme

Add composer support