Removed all LGPL headers from files.

Command used:

    cd $JOSHUA/src/joshua
    for file in $(grep -r "This file is part of" . | cut -d: -f1); do
        echo $file
        perl -i.bak -e 'undef $/; $_ = <>; s/^\/\*.*?\*\/\n+//s; print $_' $file
    done