add numerical integration stuff
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
add SGMatrixList more memory unittests and fix SG_MALLOC(SGMatrix...) issue
Normalization in CHashedDocConverter class