Merge pull request #723 from yakolee/master

1.0.11
add license
fix comment sanning for double dashes
Merge pull request #727 from xumingming/fix-scan-comment

fix comment sanning for double dashes
improved sql parser for postgresql, support create table inherits
add PGExceptionSorter
Merge pull request #730 from wenshao/master

add PGExceptionSorter
fixed compile error in macos
pg sqlparser support drop table if not exists
Merge pull request #731 from wenshao/master

pg sqlparser support drop table if not exists
register driver mbean error log level
Merge pull request #732 from wenshao/master

register driver mbean error log level
change oracle valid connection impl
Merge pull request #733 from wenshao/master

change oracle valid connection impl
Merge pull request #735 from yakolee/master

improve sqlparser & bugfix for issue 729
bug fixed for removeAbondaned
Merge pull request #736 from wenshao/master

并发优化
bug fixed for async closed
Merge pull request #737 from wenshao/master

bug fixed for async closed
improved sql parser for sqlserver, support offset fetch clause