core: Continue PieCrust3 refactor, simplify pages. The asset pipeline is still the only function pipeline at this point. * No more `QualifiedPage`, and several other pieces of code deleted. * Data providers are simpler and more focused. For instance, the page iterator doesn't try to support other types of items. * Route parameters are proper known source metadata to remove the confusion between the two. * Make the baker and pipeline more correctly manage records and record histories. * Add support for record collapsing and deleting stale outputs in the asset pipeline.

environment:
    matrix:
        - PYTHON: "C:\\Python34"
        - PYTHON: "C:\\Python34-x64"
        - PYTHON: "C:\\Python35"
        - PYTHON: "C:\\Python35-x64"

install:
    - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
    - "pip install -r requirements.txt"
    - "pip install -r dev-requirements.txt"

build: off

test_script:
  - "py.test"