Improve zh-doc, 'Handling Enums' section of configuration.
Update java-api.xml

remove wrong spaces
Merge pull request #247 from htynkn/patch-1

Update java-api.xml
Merge pull request #246 from wangdx/master

Some zh-docs improving and one javadoc polishing.
Merge branch 'master' of https://github.com/mybatis/mybatis-3
Improve zh-doc, 'objectFactory' and 'plugins' sections of configuration.