NativeReader Marlin library for LCIO conversion

I've added a 'NativeReader' library which can be loaded by ILCSoft's Marlin package to convert RAW data into LCIO collections used in the reconstruction through EUTelescope.

This makes EUTelescope no longer dependent on EUDAQ and resolves the circular dependence between the two frameworks -- therefore making installation and updating much easier.

I have tested the library with ilcinstall 1.17.04 (eutel10-dev branch) and EUTelescope (remove-nreader branch) and all tests in EUTel yielded the expected results.

Although it would have been more 'natural' to include the converter in EUTelescope, this would have been a lot more effort to move all the converter plugins over; and due to the lack of appropriate data files this could not have been tested sufficiently by me.

I would like to merge these changes now so that we can rely on them for the upcoming EUTelescope 1.0 release.