0023821: Improve qmake project files for Qt samples

Project file extension corrected for VS 2010/2012 solutions
Sources and resource files from Common and Interface sub-foldrs added to qmake project files from their original location.
RES_DIR environment variable redirected to the binary directory, all resource files copied there to keep the source tree intact.
RES_DIR environment variable corrected under Linux/MacOS similalry to Windows.
Makefile generation corrected under MacOS:
- filenames used as the output for the extra compilers instead of the absolute paths.
- mkdir and cp command options corrected

samples/qt/Tutorial/env.sh

@@ -17,6 +17,10 @@ if test `uname -s` == "Darwin" && test "${WOKHOME}" == ""; then
    exit 1
 fi
 
+host=`uname -s`
+export STATION=$host
+export RES_DIR=${aSamplePath}/${STATION}/res
+
 export PATH=${QTDIR}/bin:${PATH}
 
 source $CASROOT/env.sh