Installation

I think there may be a mistake in the cmake (but I know very little about cmake).

To build ScaleRunner with 

```
mkdir build && cd build && dhb_DIR=~/repos/dhb/build/cmake cmake ..
```

I had to change

```
include("${CMAKE_CURRENT_LIST_DIR}/dhbTargets.cmake")
```

to

```
include("${CMAKE_CURRENT_LIST_DIR}/cmake/dhbTargets.cmake")
```

