message: Instructions show out of tree build, matching the .rst
diff: @@ -42,22 +42,17 @@ The following is a quick step-by-step build guide, find the full CMake-based ins
  Step-by-step build guide:
  -1. Clone the repository:
  +1. Clone the repository and create a build directory:
  ```bash
  -$ git clone https://github.com/ornladios/ADIOS2.git
  +$ git clone https://github.com/ornladios/ADIOS2.git ADIOS2
  +$ mkdir adios2_build && cd adios2_build
  ```
  -2. Create a separate build directory in your work area:
  +2. Configure the project with CMake:
  ```bash
  -ADIOS2$ mkdir build && cd build
  -```
  -
  -3. Configure the project with CMake:
  -
  -```bash
  -ADIOS2/build$ cmake -DCMAKE_INSTALL_PREFIX=/opt/adios2/2.3.1/gnu/openmpi ../
  +adios2_build$ cmake -DCMAKE_INSTALL_PREFIX=/opt/adios2/2.3.1/gnu/openmpi ../ADIOS2
  -- The C compiler identification is GNU 7.3.0
  -- The CXX compiler identification is GNU 7.3.0
  ...
  @@ -127,16 +122,16 @@ In addition to the `ADIOS2_USE_Feature` options, the following options are also
  | `CMAKE_INSTALL_PREFIX` | /path/to/install (`/usr/local`) | Install location. |
  | `CMAKE_BUILD_TYPE` | **`Debug`** / `Release` / `RelWithDebInfo` / `MinSizeRel` | The level of compiler optimization to use. |
  -4. Compile:
  +3. Compile:
  ```bash
  -ADIOS2/build$ make -j8
  +adios2_build$ make -j8
  ```
  -5. Run tests:
  +4. Run tests:
  ```bash
  -$ ctest
  +adios2_build$ ctest
  Test project /home/chuck/adios2/build
  Start 1: HeatTransfer.BPFile.Write.MxM
  1/295 Test #1: HeatTransfer.BPFile.Write.MxM ............................................ Passed 1.25 sec
  @@ -148,9 +143,9 @@ Test project /home/chuck/adios2/build
  $
  ```
  -6. Install:
  +5. Install:
  ```
  -$ make install
  +adios2_build$ make install
  [ 7%] Built target adios2sys_objects
  ...
  [ 61%] Built target adios2
  