add some unit-tests for likelihood models
replace eigen3 exp() call with shogun exp() call
Merge pull request #1325 from votjakovr/feature/gp_refactoring

Add some unit-tests for likelihood models
add get_copy function to lib/memory to be used from typemaps for clones
fix typo in doxygen formula
add some get_strdup function to avoid compile errors (strdup is not ansi C!)
use strtod if strtold is not available
drop get_copy from octave and perl
fixed invalid read in Parser, CSVFile constructor is shortened
Merge pull request #1323 from gsomix/feature/parser

Fixed invalid read in Parser, CSVFile constructor is shortened
define _USE_MATH_DEFINES to get non-standard constant M_PI
Update LMNN to compute outer products on demand instead of keeping them in memory.
Update its unit tests too.
Merge pull request #1329 from iglesias/feature/lmnn

Update LMNN to compute outer products on demand instead of keeping them ...
fixed format for fprintf in CSVFile
Merge pull request #1331 from gsomix/feature/parser

Fixed format for fprintf in CSVFile
Merge pull request #1324 from votjakovr/feature/numerical_integration

Add numerical integration stuff