1, Describing super table causes crash, when add one tag and the data type of tag is wrong
2, The error result of show databases for no root user
3, Add additional check when super table uid is 0.
4, Fix a typo
5, Compatible with the case of super table with uid 0
6, Fix the crash when ctrl+c is triggered when querying super table.
7, Support input 'nan' or '-nan' for double/float.
8, Modified the format of query result for Grafana plugin, seperate the data into divided arrays,
   one result array per table, with the tags as the label.
   Therefor "select * from super-table-name" will work well in the Grafana query.