[backend] Fix detection of old version encoding hw adaptations
[hwc] Add environment variable QT_QPA_NO_FRAMEBUFFER_FIRST for setups like Vivante/Huawei

Signed-off-by: Carsten Munk <carsten.munk@jollamobile.com>
[hwc] Add theme hint support
Merge pull request #14 from Vesuri/themehints

[hwc] Add theme hint support
[spec] Improve versioning scheme
Do not use virtual display with HWC_DEVICE_API_VERSION_1_3

Using virtual display with HWC_DEVICE_API_VERSION_1_3 causes rendering issues, so avoid using it.
Updated comment about hwcomposer 1.2
Merge pull request #15 from siteshwar/hammerhead

Do not use virtual display with HWC_DEVICE_API_VERSION_1_3
Bump version