complete  the aggregator
complete  the aggregator
modify the RandSRG test
Merge pull request #10 from zhenzonglei/aggregator

Aggregator
xxx
Merge branch 'master' of github.com:BNUCNL/region-growing-froi
refactor Seeds, RandSRG, similarity_criterion
refactor Seeds, RandSRG, similarity_criterion
refactor Seeds, RandSRG, similarity_criterion
Complete RandSRG. Both random seed and  random neighbor are supported now
New tests for Random SRG
Merge pull request #11 from zhenzonglei/RandSRG

Rand srg