fixed that the configuration for loop for replacing the DEBVERSION and SOVERSION in the debian_from_template was running on the wrong (non-existing) directory

- replace DEBVERSION in file names in the debian_from_template directory
This is needed, since the debian version is not yet known in cmake.

added cmake script to set the version number cmake variables as needed by other scripts of the project-template

Added the new getDebianBuildVersion script and use it inside make_debian_package.sh.in to obtain the version
IMPORTANT: Projects importing this commit must edit the (newly created) DebianPackaging.config file!

- Quotes around input variables when doing string replace avoid existing semicolons from being deleted.
- The project target library itself was missing in the linker flags.

Revert "Capture only coverage data for the current project in the first place, instead of extracting it from all coverage data in a second step. This seems to be needed as extraction spuriously might fail in some cases."

This reverts commit ce14dcd0.

Reason for the revert: The change did not work on Ubuntu 12.04 due to an old version of lcov.

Capture only coverage data for the current project in the first place, instead of extracting it from all coverage data in a second step. This seems to be needed as extraction spuriously might fail in some cases.

added a variable @PROJECT_NAME@_PREFIX and use it as the required variable to make a nicer output when depending projects find this package

removed @PROJECT_NAME@_LIBRARIES from the required variables since the package might not provide a library

Use FindLibrary() cmake command to properly locate the library, even if the directory is already known. This is needed to get the proper full path reference to the library.

fixed issue with compiler/linker flags being interpreted as lists and thus having semicolons in between