Revert "Compile with Visual Studio IDE: string macros don't need to be escaped"

This reverts commit fe80df7e.

With the above commit, Creator could not be compiled with MSVC 2008.

Change-Id: Idf4763fa1996edf3b94b7059b1889e0b4dd74d38
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>