Merge branch 'vector11-gcc-4-7-fix' into 'master'

g++ 4.7 compile fix in vector11

With g++ 4.7, the following error occurs when trying to compile code that uses Vector11:

```
../OpenMesh/Core/Geometry/Vector11T.hh: In function ‘decltype ((_v1 % _v2)) OpenMesh::cross(const OpenMesh::VectorT<LScalar, DIM>&, const OpenMesh::VectorT<RScalar, DIM>&) [with LScalar = float; RScalar = float; int DIM = 3; decltype ((_v1 % _v2)) = OpenMesh::VectorT<float, 3>]’:
../OpenMesh/Core/Geometry/Vector11T.hh:89:19: error: ‘OpenMesh::VectorT<float, 3>::container OpenMesh::VectorT<float, 3>::values_’ is private
```

It looks like this version of g++ would not be able to deal with the decltype statement used when overriding the "%" operator, where the "this->values_" part is not working properly. This issue should be fixed with this merge request.

See merge request !87
7 jobs for master in 22 minutes and 31 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed clang-c++11 #9975
Linux

00:22:31

passed clang-c++98 #9977
Linux

00:16:46

passed cppcheck #9980
Linux

00:00:26

failed gcc-c++11 #9974
Linux

00:01:06

passed gcc-c++98 #9976
Linux

00:04:00

passed macos-c++11 #9978
Apple

00:16:34

passed macos-c++98 #9979
Apple

00:15:31

 
Name Stage Failure
failed
gcc-c++11 Test There is an unknown failure, please try again
[       OK ] OpenMeshVectorTest.normalized_cond (0 ms)
[ RUN ] OpenMeshVectorTest.size_dim
[ OK ] OpenMeshVectorTest.size_dim (0 ms)
[----------] 13 tests from OpenMeshVectorTest (0 ms total)

[----------] 1 test from OpenMeshVectorGCCBugTest
[ RUN ] OpenMeshVectorGCCBugTest.alignment_bug
CI/ci-linux.sh: line 93: 22117 Segmentation fault ./unittests --gtest_color=yes --gtest_output=xml
ERROR: Build failed: exit status 1