ShaderView : Remove `using namespace std`.
ShaderView : Remove `using namespace std`.

Following a hunch while trying to track down the C++11 crashes on Travis.

chippey/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,hradec/gaffer,ImageEngine/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,ImageEngine/gaffer,appleseedhq/gaffer,chippey/gaffer,boberfly/gaffer,ImageEngine/gaffer,appleseedhq/gaffer,chippey/gaffer,ImageEngine/gaffer,boberfly/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,hradec/gaffer,lucienfostier/gaffer,hradec/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,ivanimanishi/gaffer,appleseedhq/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,chippey/gaffer,hradec/gaffer,GafferHQ/gaffer,johnhaddon/gaffer,andrewkaufman/gaffer,andrewkaufman/gaffer,boberfly/gaffer,appleseedhq/gaffer,hradec/gaffer,andrewkaufman/gaffer,boberfly/gaffer