Make left singular functions the default in VAMP

[fabian-paul]

Make left singular functions the default in VAMP. Also added kinetic map scaling of the right singular functions if the user wants it.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (devel@ad09dff). Click here to learn what that means.
The diff coverage is 100%.

@@           Coverage Diff            @@
##             devel    #1394   +/-   ##
========================================
  Coverage         ?   91.53%           
========================================
  Files            ?      226           
  Lines            ?    25484           
  Branches         ?        0           
========================================
  Hits             ?    23327           
  Misses           ?     2157           
  Partials         ?        0

Impacted Files	Coverage Δ
pyemma/coordinates/tests/test_vamp.py	98.42% <100%> (ø)
pyemma/coordinates/api.py	88.21% <100%> (ø)
pyemma/coordinates/transform/vamp.py	91.63% <100%> (ø)

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[marscher]

Thank you!