use the STL force, Luke! _activeRenderers should be a list + give a reference to the project mutex instead of lock/unlock methods to avoid deadlocks in case of exceptions
avoid deadlocks: use a QMutexLocker, even for external locking
fix compilation + request comments
use EXPECT_EQ and EXPECT_NE for comparisons
coveralls: ignore Tests/google-mock
Lut: fix conversions between integer types and float (which were coded at different places, and were almost all wrong) + add tests