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First set of QT4 ifdef removals

See merge request !322

refs #141

- Settings dialog for OpenGL

This reverts commit 61d74887

- Fixed RPC call from another thread (Thanks to Matthias Möller for the patch)

Feature ci debug configuration

Closes #147

See merge request !321

interpreted as a command, because of a missing space character

* removed hardcoded parts of buildpath from build script
* moved cmake_build_type from build script to config script
* set buildpath according to build type in config script
* removed hardcoded paths from ci-test script, as config script sets the
path

synchronize master with unstable branch

Closes #126

See merge request !305

featureGlewSeparation branches

tely this changs all unstable submodules