fixed python typemaps
Merge pull request #399 from gsomix/python3_interface

updates on python3 interface
Merge pull request #398 from karlnapf/master

First bunch of fixes for migration
remove debug code / string typemap
add -f option to tester to only show failed tests
initializ m_features with NULL / fixes hang
show case / exception in tester
Refinements of making testsuite data generation script run.
Added label mapping support and accuracy calculation for clustering evaluation.
Added example of kmeans clustering and computing clustering performance via accuracy.
Remove debug code.
Merge remote-tracking branch 'upstream/master'
~ comment UNREF in destructor to avoid complaint with valgrind and + more comments
- break after return
+ assign m_machine default value in default constructor
+ block training if m_machine not specified
~ better comment
+ libshogun and python_modular example of MulticlassMachine
- breaks after returns
* compile warning