More Documentation On Architecture and Usage

[LiXizhi]

• documentation on NPLRuntime wiki
• configuration doc should also be refined with examples.

[liuluheng]

add a section on implementation in wiki

@LiXizhi

[LiXizhi]

I have modified
https://github.com/NPLPackages/TableDB/projects/1

@liuluheng

[liuluheng]

refined Configuration section with examples.

[LiXizhi]

There is a student from 南方科技大学， who is working on creating log system based on raft table db. he may contact you on github.

[liuluheng]

ok