Degrees of freedom (m_df) field moved from CLikelihoodModel to CStudentsTLikelihood
Make more efficient usage of cholesky
Some fixes in GP framework
SG_UNREF added to prevent memory leak
ignore temporary files created by csharp and octave interfaces
Merge pull request #1004 from votjakovr/develop

Some fixes in GP framework
Merge pull request #1006 from ppletscher/feature/gitignore

ignore temporary files created by csharp and octave interfaces