model: TRY nesting wltc_data() in /params/wltc_data using
jsonschema-refs.

TOO SLOW (0.15sec-->4.13!!)
[ci skip]
model: Nested wltc_data() in /params/wltc_data using
jsonschema-refs.

TOO SLOW (but perfed)
model: TRY PandelVisitor to check if validation speeds-up.
pandel: Speed-up 10% PandelVisitor by removing recursive scoping.

* Do not validate model-schema on experiment-executions.  Extremely
slow!
pandel: FIX tests from prev-commit that validates meta-schema with
visitor.
* model, core: Possible to force ``f_downscale``.
* model: Delete forgotten rsults_base().
* ci: Test building in 'pypi' environment.
* ci: TravisCI possible to deploy into PyPi if repo tagged.
* docs: Prepare CHANGES for release.
BUMP VER 0.0.9-alpha-->alpha1

* build: Set default python for eclipse.
Merge branch 'schema_refs'.