add Q&A
update index
update TODO
update TODO
automatically obtain the coordinate for the region growing
add range selection for region growing
add changelog.rst
update doc
Merge branch 'add-q-and-a' of https://github.com/sealhuang/FreeROI into add-q-and-a

* 'add-q-and-a' of https://github.com/sealhuang/FreeROI:
  add changelog.rst
Merge branch 'master' of https://github.com/BNUCNL/FreeROI
update Q&A
update doc
add messagebox to give user feedback
exchange x and y coordinate
Merge pull request #8 from liuzhaoguo/master

automatically obtain the coordinate for region growing
Merge pull request #10 from sealhuang/add-q-and-a

Add q and a