* Add support to UUID type
* Simplify and use a simple QString instead of a QUuid.
Work for using a QUuid is way larger than supporting QString (imply modifying multiple c++ templates).
Current needs are fullfill with the use of a simple QString, so I let the use of QUuid for future enhancement.
* - add windows executable for generating qt5 security samples
- update sample clients
PS : some modifications on the samples are not related to the patch I applied. Were the samples up-to-date ?
