Qt.py support and RV integration#3

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nebukadhezer wants to merge 6 commits intopaulwinex:masterfrom

nebukadhezer:master

Commits on Apr 28, 2018

modified all to run with qt.py removed namespaced imports in favour of explicit imports
johannes
committed
added python sdtalone file in favour of main,
johannes
committed
changed all lower level modules to import parents as relative imports
johannes
committed

Commits on Apr 29, 2018

only open a file from argv if there are more args than the file itself, set the stylesheet only in standalone mode not dccs with a working palette and stylesheet
johannes
committed
added rv support
johannes
committed

Commits on Apr 30, 2018

fix maya mainwindow function use qtcompat to resizeHeader
nebukadhezer
committed