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.

from invoke import Collection, task, run
from garcon.benchsite import genbenchsite
from garcon.changelog import genchangelog
from garcon.documentation import gendocs
from garcon.messages import genmessages
from garcon.pypi import makerelease


ns = Collection()
ns.add_task(genbenchsite, name='benchsite')
ns.add_task(genchangelog, name='changelog')
ns.add_task(gendocs, name='docs')
ns.add_task(genmessages, name='messages')
ns.add_task(makerelease, name='release')