So instead of passing every function objects by value (a copy is made), now function objects
will be handled properly by reference (for lvalues) or by value (for rvalues).
Enums are stored as strings, that improves configuration file
readability and maintainability. String values are obtained via
QMetaEnum, and since with Qt 5.5 QMetaEnum::fromType() includes a
static_assert, this has to be a safe method.
* Add another constructor to save a call to proxyFunc when its not needed
note that this call is a virtual function call
* Pass in proxyFunc by const reference
* Move get methods together
Change project directory structure according to application structure.
Change 'nox' configuration option to something more meaningful 'nogui'.
Rename 'Icons' folder to 'icons' (similar to other folders).
Partially add 'nowebui' option support.
Remove QConf project file.
FranciscoPombal