Improved error handling in many places to detect missing files or NULL file handles.
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close() file before dying.
mixture model training added; EM for mixture model added
memory errors fixed
[ci skip] More notebook fixes
see #2361
Fix r_modular externalptr error
[travis] add ppa to dump swig version
fix for broken BAHSIC unit test on freebsd bot
Added a ppa with swig 2.0.7 to travis conf
Merge pull request #2479 from matthuska/r-externalptr-error

Fix r_modular externalptr error
Merge pull request #2480 from lambday/develop

fix for broken BAHSIC unit test on freebsd bot
Remove R job from allow to fail jobs on travis
since R modular interface is finally fixed! \o/
[ci skip]
reduced the execution time of the autoencoders notebook
minor changes in mixture models
Merge pull request #2448 from mazumdarparijat/em

mixture model training added; EM for mixture model added
Merge pull request #2477 from yorkerlin/develop

rename the GPC modular