add warnings on deprecated pipeline classes
add tests for strip_html and trim_whitespace
use spaces within README.md instead of tabs
add a CHANGELOG section for bc-break changes
Merge branch 'master' of github.com:fictivekin/openrecipes

Conflicts:
	CONTRIBUTORS
	README.md
	scrapy_proj/openrecipes/pipelines.py
	scrapy_proj/tests/util_tests.py