Support for SAP 9.1

Added SAPBusinessOneSDK, since it's the default DLL for SAP 9.1
development.

Removed Interop.SAPbobsCOM.dll, since it's now embedded into
SAPBusinessOneSDK.

Keeped SAPbouiCOM.dll, so we do not get any reference missing exception
for addins compiled for SAP 9.0.
Merge branch 'master' into 9.1
Merge branch '9.1'