The pre- and postbuild events and their commands like xcopy and robocopy should be reworked using MSBuild tasks.

These tasks can be defined in a separated build.targets file for each *.csproj.

h4. Additional Information
Using MSBuild tasks and the build.targets files

 - fixes a problem if there were multiple commands in post build and some of them failed, but the last succeeded, the build process did not noticed there were a failure as errorlevel was 0 because of last command.

 - uses MSBuild based logging so it allows use to use the xmllogger and include messages of these tasks in our BuildReport as well

 - allows usage of all available MSBuild tasks without the need to provide additional tools or exe files

 - separates the pre/post build commands from the *.csproj file (no changes of *.csproj only because of a new file copy)

 - increases transparency by keeping the pre-post build tasks within a dedicated xml-based file