Put the header files into the correct directory.
Put the header files into the correct directory.

* SConstruct:
  (incdir): the headers must go into PREFIX/include/serf-2/

liuzongquan/serf,justinweb/serf,blueszhangsh/serf,TommyU/serf,Manouchehri/serf,liuzongquan/serf,justinweb/serf,muthusuba/serf,Manouchehri/serf,idomon/serf,Manouchehri/serf,wzugang/serf,sworda/serf,wzugang/serf,liuzongquan/serf,TommyU/serf,krime/serf,justinweb/serf,blueszhangsh/serf,wzugang/serf,muthusuba/serf,krime/serf,wzugang/serf,idomon/serf,blueszhangsh/serf,krime/serf,Manouchehri/serf,muthusuba/serf,blueszhangsh/serf,TommyU/serf,idomon/serf,justinweb/serf,krime/serf,sworda/serf,sworda/serf,idomon/serf,liuzongquan/serf,sworda/serf,TommyU/serf,muthusuba/serf