SELECT/INSERT/UPDATE/DELETE over REST

I proposing a configuration for this issue

``` nginx.conf
{
 # Contexts location, location if
 location = /my_insert {
   tnt_http_insert [on, off];
   tnt_pass UPSTREAM;
 }
 location = /my_delete {
   tnt_http_delete [on, off];
   tnt_pass UPSTREAM;
 }
 ... and so on ...
} 
```
