re-added CMake rules to find ZestSC1 driver package (presumably lost in cleanup)
removed stale sym link in altro producer dir
now requiring CMake version > 2.8 to use FILE() macro only available on 2.8 or later
when running cmake, the tlu firmware and the zestsc1 driver packages will be searched for and installed from AFS if not found;
the default path to the firmware bitfiles is compiled into the TLU binaries.
fixed warning due to const string conversion
some updates to READMEs