Merge pull request #15 from zhouguangfu/master

Random SRG class and Aggregator class.
Merge pull request #16 from zhouguangfu/master

Add a memeber to seeds class, rename the grow function to growing functi...
Merge pull request #17 from zhouguangfu/master

Added some new class which inherit SimilarityCriteria class and made som...
Merge pull request #18 from zhouguangfu/master

Adjust the parameter of the SimilairtyCriteria class and Region class.
make the AverageContrast could run
Merge branch 'master' of https://github.com/BNUCNL/region-growing-froi
make the AverageContrast could run
make PeripheralContrast could run
make PeripheralContrast could run1
Merge pull request #19 from liuzhaoguo/master

make the PeripheralContrast could run
modify the test
Merge pull request #20 from liuzhaoguo/master

modify the test
add connectivity to ACB and make it run
let code meet PEP8 standard and add connectivity to PCB
Merge pull request #21 from liuzhaoguo/master

let code meets PEP8 standard and add connectivity
Merge branch 'master' of github.com:BNUCNL/region-growing-froi
Modified the parameter of the SimilarityCriteria class to be a region class.