message: Easier build doc
diff: ## Building (Linux)
  1. Install unixodbc >= 2.3.0
  +```bash
  +sudo apt install unixodbc-dev
  +```
  +
  2. At the root of source directory:
  - - mkdir build
  - - cd build
  - - cmake .. && make
  +```bash
  +mkdir -p build; cd build && cmake .. && make -j $(nproc || sysctl -n hw.ncpu || echo 2)
  +```
  +
  3. clickhouse-odbc.so will be at ```build/driver/clickhouse-odbc.so```
  ## ODBC configuration
  