Merge pull request #271 from wenshao/master

增强WallFilter
Merge pull request #272 from wenshao/master

improve WallFilter
add the test of batch inserting used all kinds of data source.
code format
Merge pull request #278 from yunnysunny/master

add the test of batch inserting
add the function of getting duird's monitor data form remote server via
jmx.
Merge branch 'master' of https://github.com/alibaba/druid
code format
Merge pull request #280 from yunnysunny/master

add the function of getting duird's monitor data form remote server via jmx.
Merge remote-tracking branch 'upstream/master'