Global Graph2
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge branch 'master' of https://github.com/ryaninhust/sampling
unify the format
unify the format new
sample strategy
sample strategy new
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge pull request #5 from Hyiiego/master

[Fix] modify forest fire and snow ball
Merge pull request #6 from Hyiiego/master

[Fix] if unvisit_edge list is empty, just continue
Merge pull request #7 from Hyiiego/master

[Fix] fix start_seeds bug
Merge branch 'master' of https://github.com/ryaninhust/sampling
remove read_nodes
sampling algorithm
remove original sample network
[Fix] Hotfix
Merge branch 'master' of https://github.com/ryaninhust/sampling
Merge pull request #8 from ranyu/master

sampling network
modify sampling