add more skip check lambdas
Merge pull request #340 from reaperhulk/skip-checks-all-around

Add more skip check lambdas
Document our API stability policy. Fixes #312
Forgotten file
Note abotu development versions
Typo
Rephrase
Merge pull request #341 from alex/backwards-compat

Document our API stability policy. Fixes #312
Slightly reorganize and cleanuip the backend docs
Cover a missed branch
Merge pull request #342 from alex/reorganize-backend-docs

Slightly reorganize and cleanuip the backend docs
Merge pull request #343 from alex/fix-coverage

Cover a missed branch
add test marks for various backend functionality
whoops, python 2.6 compatible format string
add all the markers to the tests
Merge pull request #345 from reaperhulk/mark-tests

Add test marks for various backend functionality
Merge branch 'master' into mark-tests-2

* master:
Include teh name of the backend in the error message
Update test
correct import style