Welcome QEnginio and QEnginioModel

Fast and dirty prototype of an Enginio api. It is full of
unfinished parts but it already kind of works. I believe that result
simplify QML code in comparison to the original api. I think that
separation between QEnginio and QEnginioModel is the right one. I assume
that in 90% cases people will query a data (/v1/objects , /v1/users etc.) and
for such case the model was created. For everything custom QEnginio can be used,
as it provide full imperative api.

Missing parts:
- other areas
- lazy population of QEnginioModel
- examples for error handling
- naming convention is taken from Qt it should be revised
- implementation hiding in a BC way
- splitting into a separate files
- docs
- more and more stable tests
- fixing all todos
- removing debug code
- C++ examples
- namespacing
- proper build fix
- and many more :/