Fix issue #236 - Node connector patch update to 1.2.1

Bug fix

Docs Update; Completed async functionality for Node.js connector v1.2.0

removed broken code

Docs
- Docs updated
  - include third party connectors links
  - local docs updated to web versions and fixed for compatability
Node
- Async added
- Deleted uncessary code
- Docs updated

Add initial driver connector for rust

Grammar and typo fixes. Updated some docs

minor improvements to 'setErrMsg'

remove duplicate include in trpc.c

Documentation Update

1. code like `char msg[] = "xxxxxx"` unnecessarily copied the string to stack, changed to `const char* msg = "xxxxxx"`.
2. the 2rd argument of `setErrMsg` is changed from `char*` to `const char*`.
3. the 3rd argument of `setErrMsg` is removed as `strncpy` stops copying at the end of source string.

Updated nodejs connector to 1.1.1

Implemented higher level API to make it more modular
Using promises and callbacks
Argument binding is now available e.g query(select ? from ?).bind("*", "table")

Added local documentation and updated README

fix #174