[python] Add support for Python 3 usage from QML
Merge pull request #20 from sailfish-sdk/python-support

[python] Add support for Python 3 usage from QML
[conf] allow libssl and libcrypto
[conf] allow libssl and libcrypto
[conf] allow liblzma

resolve confilct
[conf] allow liblzma
[conf] allow libxml2

resolve conflict
[conf] allow libxml2
[conf] allow libogg
[conf] allow libvorbis libs
[conf] allow qt5-qtfeedback
[conf] allow QtGraphicalEffects