Use global random as extern to avoid SG_REF/UNREF calls
Ignore SFMT headers in doxygen generation
Random: use two SFMT struct instead of one
SFMT random regerator requires reinitalization if one wants
to generate a 64-bit random after generating a 32-bit random
and vice-versa. In order to avoid reinitalization, rather have
2 different SFMT structs for the 32-bit and the 64-bit RNG.
Initial import of dSFMT
Change include paths in dSFMT for shogun
Ignore dSFMT in doxygen generation
Fix redefinition of W128_T in dSFMT
Add dSFMT wrapper API to Random
Define DSFMT_MEXP same as SFMT_MEXP
Random: Initialize class variables to NULL
Add unit test for Random