New test AnalyticalVSNumericalRandom.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/tests/unit/anisotropic_matrixes.cpp
Revert "Add .refresh() call, fix unit tests for anisotropic matrixes"
Adjust tests to use immutable matrices properly

This reverts commit 08df5a001de39f9afdcf4e1627c7d55cbf250cdb.
Fix for string and int concat
Add -lrt to default linker flags
Merge remote-tracking branch 'cranon/master'

Conflicts:
	src/tests/unit/anisotropic_matrixes.cpp
New test AnalyticalVSNumerical.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/tests/unit/anisotropic_matrixes.cpp
Make all anisotropic matrixes unit tests use templates
Merge remote-tracking branch 'akazakov/master'
Merge remote-tracking branch 'cranon/master'