+ we_pinterest: this new version now works on Aeva Media pages. (We-Pinterest-Main.php, plugin-info.xml)

@ Notes: I removed the template code because everything the plugin does can be done from the source file (for now). I moved the hook to load_theme so that it gets loaded on all pages, including galleries. Finally, I rewrote the JavaScript to account for linked images. This should cover everything, but in AeMe pages you'll notice that while you can pin a preview, you can't pin a full image. That's because they're generated dynamically, and I don't want to make this plugin more complicated than it should be.

Signed-off-by: Nao <nao@wedge>