Merge pull request #1771 from dingpinglv/Iss4757_ReleaseAlpha2

Issue #4757: update the CHANGELOG.txt and AUTHORS.txt
Fixed a bug that ant. Variable name changed
Merge pull request #1772 from VisualSJ/develop-3.0

Fixed a bug that ant. Variable name changed
Fixed a bug that ant. Variable name changed
Merge pull request #1773 from VisualSJ/develop-3.0

Fixed a bug that ant. Variable name changed
Issue #4757: update the CHANGELOG.txt and README.mdown