Warnings during build on OSX 10.10 due to deprecated functions and stuff

[mkae]

Deprecated functions:

/Users/marko/WC/GIT/brdf/src/brdf/IBLWidget.cpp:68: warning: 'gluErrorString' is deprecated: first deprecated in OS X 10.9 [-Wdeprecated-declarations]
        const char *errDescr = (const char *)gluErrorString(glErr);
                                             ^
/Users/marko/WC/GIT/brdf/src/brdf/IBLWidget.cpp:321: warning: 'gluLookAt' is deprecated: first deprecated in OS X 10.9 - "Use GLKMatrix4MakeLookAt" [-Wdeprecated-declarations]
    gluLookAt( lookVec[0], lookVec[1], lookVec[2],
    ^

/Users/marko/WC/GIT/brdf/src/brdf/IBLWidget.cpp:566: warning: 'gluOrtho2D' is deprecated: first deprecated in OS X 10.9 - "Use GLKMatrix4MakeOrtho" [-Wdeprecated-declarations]
    gluOrtho2D(0.0, (float)width(), 0.0, (float)height());
    ^

/Users/marko/WC/GIT/brdf/src/brdf/Plot3DWidget.cpp:176: warning: 'gluPerspective' is deprecated: first deprecated in OS X 10.9 - "Use GLKMatrix4MakePerspective" [-Wdeprecated-declarations]
    gluPerspective(FOV_Y, float(width()) / float(height()), nearPlane, farPlane);
    ^

Malformed header guards:

/Users/marko/WC/GIT/brdf/src/brdf/MainWindow.h:46: warning: 'MAIMWINDOW_H' is used as a header guard here, followed by #define of a different macro [-Wheader-guard]

/Users/marko/WC/GIT/brdf/src/brdf/geodesicHemisphere.h:46: warning: '_GEODESIC_HEMI_H_' is used as a header guard here, followed by #define of a different macro [-Wheader-guard]

Wrong expressions?

/Users/marko/WC/GIT/brdf/src/brdf/ptex/PtexUtils.cpp:48: warning: comparison of constant 2 with expression of type 'Ptex::MeshType' is always false [-Wtautological-constant-out-of-range-compare]
    if (mt < 0 || mt >= int(sizeof(names)/sizeof(const char*)))
                  ~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/Users/marko/WC/GIT/brdf/src/brdf/ptex/PtexUtils.cpp:57: warning: comparison of constant 4 with expression of type 'Ptex::DataType' is always false [-Wtautological-constant-out-of-range-compare]
    if (dt < 0 || dt >= int(sizeof(names)/sizeof(const char*)))
                  ~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

/Users/marko/WC/GIT/brdf/src/brdf/ptex/PtexUtils.cpp:75: warning: comparison of constant 4 with expression of type 'Ptex::EdgeId' is always false [-Wtautological-constant-out-of-range-compare]
    if (eid < 0 || eid >= int(sizeof(names)/sizeof(const char*)))
                   ~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~