Made tests work again, added Alex as author

gtsam/geometry/Sphere2.cpp

@@ -14,6 +14,7 @@
  * @date Feb 02, 2011
  * @author Can Erdogan
  * @author Frank Dellaert
+ * @author Alex Trevor
  * @brief The Sphere2 class - basically a point on a unit sphere
  */
 

gtsam/geometry/Sphere2.h

@@ -14,6 +14,7 @@
  * @date Feb 02, 2011
  * @author Can Erdogan
  * @author Frank Dellaert
+ * @author Alex Trevor
  * @brief Develop a Sphere2 class - basically a point on a unit sphere
  */
 
@@ -23,7 +24,7 @@
 #include <gtsam/base/DerivedValue.h>
 
 #ifndef SPHERE2_DEFAULT_COORDINATES_MODE
-  #define SPHERE2_DEFAULT_COORDINATES_MODE Sphere2::EXPMAP
+  #define SPHERE2_DEFAULT_COORDINATES_MODE Sphere2::RENORM
 #endif
 
 // (Cumbersome) forward declaration for random generator

gtsam/geometry/tests/testSphere2.cpp

@@ -13,6 +13,8 @@
  * @file testSphere2.cpp
  * @date Feb 03, 2012
  * @author Can Erdogan
+ * @author Frank Dellaert
+ * @author Alex Trevor
  * @brief Tests the Sphere2 class
  */