[appveyor] Tried to set Qt environement in Visual Studio 2017 image

[appveyor] Tried to set Qt environement to the latest Qt5 supported

[kicad:schematicsimport] Fixed segfault in textimporter electricalType when column is not present

Merge pull request #60 from nippoo/electrical-type-csv-import

[kicad:schematicsimport] Added basic support for importing pin electrical type from a CSV

[kicad:model] Added const ref to complex types getters

[kicad:model] Transformed Pin::direction to 360 angle to match with new Kicad format

[kicad:model] Renamed Pin::layer to Pin::unit to unify with Draw::unit and kicad naming

[kicad:model] Removed useless const references

[kicad] Moved pin model function specific to old kicad parser to KicadLibParser

Reformated project

Replaced old style connect with Qt5 style connect

[uconfig_gui] Fixed layout of component info editor

[kicad:schematicsimport] Try to fix error build on Windows

Explicit `<QtCore/qglobal.h>` includes (#51)