Merge pull request #1681 from karlnapf/develop

speed ups for tests
removed notebooks since there will be a more complete one soon
reduced size and accuracy for speeding up unit-tests
minor documentation correction
Merge pull request #1683 from lambday/develop

reduced size and accuracy for speeding up unit-tests
set epsilon 1e-4 by default for krr
Merge pull request #1685 from votjakovr/feature/gp_refactoring

Set epsilon=1e-4 by default for krr
added a new ica notebook using image data, fixed typo in other notebooks
added set seed for failing unit-test
Merge pull request #1689 from pickle27/develop

added a new ica notebook using image data, fixed typo in other notebooks
Merge pull request #1690 from lambday/develop

added set seed for failing unit-test
Several minor improvements in the LMNN notebook.
Links to Doxygen, references section, spell check.
Merge pull request #1691 from iglesias/feature/lmnn

Several minor improvements in the LMNN notebook.
disable SSE on CYGWIN
require new data version
Fix ipython notebooks

- drop corrupt logdet.ipynb
- don't pickle dump/load results in FGM
log-det ipython notebook json error fixed
another attempt to fix FGM
Merge pull request #1692 from lambday/develop

log-det ipython notebook json error fixed
Attempt to fix issue #1625
rename macro USE_HMMPARALLELSTRUCTURES -> USE_HMMPARALLEL_STRUCTURES as
it is used in HMM.cpp