Readme bump for #3159

Conflicts:
	readme.txt
Replaced placeholder plugin

As committed on master branch:
- https://github.com/woothemes/woocommerce/commit/d1fbc3b7f10793848951b3e6ce61662df7cafda6

Conflicts:
	assets/js/frontend/woocommerce.min.js
Check product exists before showing it as an option

As committed on master branch:
- https://github.com/woothemes/woocommerce/commit/28933f1fec2cb2feee2cf43f6d319990f5753088

Conflicts:
	admin/post-types/writepanels/writepanel-product_data.php
2.0.11 version bump

Conflicts:
	readme.txt
	woocommerce.php
Fixed minification for woocommerce.js file
Date bump for 2.0.11
Merge branch 'refs/heads/release-11-fix'

Conflicts:
	assets/js/frontend/woocommerce.min.js
	includes/class-wc-checkout.php
	readme.txt
	woocommerce.php