Merge pull request #25 from pondering/master

fix bug. tridiagonal matrix is wrong previously.
finish task bp
update raidus test
Merge pull request #26 from spininertia/master

add task bp
update folder
update folder
Merge branch 'master' of github.com:spininertia/graph-mining-rdbms into spininertia-master
add bp,radius to proposed method
Merge pull request #28 from spininertia/master

add bp,radius to proposed method
merge with other methods
simple plan