Doc: Rename libBornAgainCore => libBornAgainSim

hugo/content/howto/troubleshooting/index.md

@@ -40,7 +40,7 @@ When Mantid is installed on the system, BornAgain might conflict with its librar
 ```bash
 $ python -c "import bornagain"
 
-Incompatible library version: libBornAgainCore.so requires
+Incompatible library version: libBornAgainSim.so requires
 version 18.0.0 or later, but libgsl.0.dylib provides version 16.0.0
 ```
 

hugo/content/introduction/architecture/index.md

@@ -12,9 +12,9 @@ available at https://jugit.fz-juelich.de/mlz/bornagain.
 ### General Structure
 
 The framework consists of two shared libraries written in C++,
-libBornAgainCore and libBornAgainFit, and a standalone graphical user
+libBornAgainSim and libBornAgainFit, and a standalone graphical user
 interface. Thanks to the Python bindings the libraries can be imported
-into Python as external modules. The library libBornAgainCore defines
+into Python as external modules. The library libBornAgainSim defines
 the data structures and provides the algorithms needed to set up a
 sample model and to run a simulation. The library libBornAgainFit
 contains several minimization engines and interfaces to each of them,