This fixes problems when a project adds a directory to
CMAKE_PREFIX_PATH, then calls find_package(Poco ...) and afterwards
calls find_package() for another project located in one of the
directories of the original CMAKE_PREFIX_PATH variable.
- Add missing CMakeLists.txt
- Use POCO_ macros to improve code structure in XCode/VisualStudio
- Better ODBC detection
- Remove unnecessary commented out code
The CMake documentation recommends explicitly listing source files, but because CMake is not the primary build system GLOB patterns are used for the moment.
By convention CMake project files are placed on a folder called "cmake" and then called from the build system by appending the CMAKE_MODULE_PATH variable
