Adding my "fix" to make dense sparse dot products efficient. Code is ugly due to limitations of la4j's API
Merge pull request #171 from RaffEdwardBAH/master

Adding my "fix" to make dense sparse dot products efficient. Code is ugl...
Merge branch 'master' of github.com:vkostyukov/la4j
Merge branch 'master' into operations

Conflicts:
	src/main/java/org/la4j/vector/AbstractVector.java