Started working on issue #42
Added createBlockMatrix method to Basic2DFactory (issue #42)
Added createBlockMatrix method to Basic1DFactory (issue #42)
Added createBlockMatrix wrapper to SafeFactory (issue #42)
Added createBlockMatrix method to CRSFactory (issue #42)
Added createBlockMatrix method to CCSFactory (issue #42)
Merge branch 'master' of https://github.com/SamoylovMD/la4j