[BoostXmlCndInterface] Changed sig. of virtual Writer::write().
[BoostXmlCndInterface] Made reading/parsing of geometry tag xml more clear.
[BoostXmlConditionInterface] Added CondType _type to decide what type of condition should be written.
[BoostXmlConditionInterface] Added some code for writing conditions to xml file.
Merged XmlIO.
WIP: profile