Merge pull request #12 from javamonkey/develop

同步作者修改
[maven-release-plugin] prepare release v2.0.6
[maven-release-plugin] prepare for next development iteration
Merge pull request #34 from gyk001/develop

2.0.6发布，开始2.0.7快照版
bug fix of range
bug fix of []
html var binding
doc
more test
Merge branch 'develop'

Conflicts:
	beetl-core/src/test/java/org/beetl/core/function/FunctionTest.java