Merge pull request alibaba#510 from jacking124/master

fix issues alibaba#509

Merge pull request alibaba#505 from cutedemons/master

modify version

Merge pull request alibaba#475 from cutedemons/master

improve sql wall & fix datasource bug

0.2.26 publish

0.2.25-release

Merge branch 'master' of https://github.com/alibaba/druid

Merge pull request alibaba#372 from wenshao/master

add testcase & remove unused code

Merge pull request alibaba#347 from wenshao/master

0.2.20