remove two blank lines
BF for cross-platform purpose and add configuration files for building windows exe file
Merge remote-tracking branch 'upstream/master'

* upstream/master:
Merge pull request #6 from sealhuang/master

Fix bugs for cross-platform purpose and add configuration files for building windows exe file
setup sphinx doc environment
Merge pull request #7 from yangzetian/doc-setup

setup sphinx doc environment
mod gitignore for _build dir, add other doc dirs
Merge pull request #8 from yangzetian/doc-setup

mod gitignore for _build dir, add other doc dirs
add directory `data` and `icon` while building windows exe file
Merge remote-tracking branch 'upstream/master' into windows_building

* upstream/master:
  mod gitignore for _build dir, add other doc dirs
add qimageview module for windows version
Merge pull request #10 from sealhuang/windows_building

add directory `data` and `icon` automatically while building windows exe file
BF in setup.py and main.py
add region grow function
modify region grow
Merge pull request #11 from sealhuang/writing_doc

BF in setup.py and main.py
merge from upstream
modify gitignore
Merge pull request #13 from liuzhaoguo/master

add region grow function