Correct types for parsing ptree with BOOST_FOREACH.
Reorder #include section.

Boost header must be included before any Qt stuff. It is probably related
to
https://svn.boost.org/trac/boost/ticket/6455 and
https://svn.boost.org/trac/boost/ticket/6131 .
Use GEOModels in ProjectData only when we build the gui version.
Backup: Next step in reading boundary conditions using BoostXml.