[serialization] Switch to pickle with h5 backend

[marscher]

• Ensures only save modules/packages can be restored.
• handling of renamed classes, modules, packages handled.
• store pyemma version in the h5 file during save.
• restored objects have the private field '_restored_from_pyemma_version'
• 20 times faster than jsonpickle

[codecov]

Codecov Report

Merging #1200 into models_estimators_serializable will decrease coverage by <.01%.
The diff coverage is 96.58%.

@@                        Coverage Diff                        @@
##           models_estimators_serializable   #1200      +/-   ##
=================================================================
- Coverage                            91.3%   91.3%   -0.01%     
=================================================================
  Files                                 212     214       +2     
  Lines                               22342   22380      +38     
=================================================================
+ Hits                                20400   20434      +34     
- Misses                               1942    1946       +4

Impacted Files	Coverage Δ
pyemma/msm/tests/test_reactive_flux.py	99.12% <100%> (+0.13%)	⬆️
pyemma/_base/serialization/tests/test_topology.py	100% <100%> (ø)
pyemma/_base/serialization/util.py	81.57% <100%> (-10.53%)	⬇️
pyemma/coordinates/tests/test_serialization.py	98.15% <100%> (ø)	⬆️
...ma/_base/serialization/tests/test_serialization.py	94.15% <100%> (+0.27%)	⬆️
pyemma/_base/serialization/mdtraj_helpers.py	88.63% <88.63%> (ø)
pyemma/msm/models/reactive_flux.py	93.89% <96%> (-0.18%)	⬇️
pyemma/_base/serialization/serialization.py	88.76% <98.14%> (+0.48%)	⬆️
pyemma/_base/serialization/pickle_extensions.py	98.3% <98.3%> (ø)
... and 7 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 11f4aac...953f9d4. Read the comment docs.