See: <https://bugs.gentoo.org/show_bug.cgi?id=454104> and <
https://tinderboxlogs.s3.amazonaws.com/tbamd64.excelsior.flameeyes.eu/sci-libs%3
Avotca-tools-1.2.3%3A20130126-015723.html>

I could reproduce the problem only in combination with gcc-4.7. I guess it 
boils down to:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.7.2/include/g++-v4/bits/stl_algo.h:4940:5: 
note:   template argument deduction/substitution failed:
include/votca/tools/tokenizer.h:96:9: note: could not resolve address from 
overloaded function 'lexical_cast<int, std::string>'