Fix typo

ChangeLog

@@ -129,14 +129,14 @@ ViSP 3.0.0 (released December 18th, 2015)
     . Compatibility with Windows 8.1 and 10
     . Compatibility with Microsoft Visual C++ 2015 (MSCV 14)
     . Compatibility with Odroid XU4
-    . Source code migrates to GitHub: http://github.org/lagadic/visp
+    . Source code migrates to GitHub: http://github.com/lagadic/visp
     . Introduce Travis continuous integration
     . New website: http://visp.inria.fr
     . Reorganize source in modules (core, vision, mbt, tt, …) with a library
       per module named libvisp_<module>. Keep compat with previous releases.
     . Allow to link contributions to ViSP source code using
       VISP_CONTRIB_MODULES_PATH CMake var;
-      see http://github.org/lagadic/visp_contrib
+      see http://github.com/lagadic/visp_contrib
     . Model-based tracker:
       + New visibility tests based on the scanline rendering algorithm.
       + Improve Ogre3D visibility tests in order to use it in a probalistic

doc/mainpage.doc.in

@@ -15,7 +15,7 @@ href="http://www.inria.fr/en/centre/rennes" target="_parent">Inria Rennes</a>.</
 
 <p>ViSP wiki is <a href="https://github.com/lagadic/visp/wiki" target="_parent">https://github.com/lagadic/visp/wiki</a></p>
 
-<p>ViSP source code is now available on GitHub <a href="https://github.org/lagadic/visp" target="_parent">https://github.org/lagadic/visp</a></p>
+<p>ViSP source code is now available on GitHub <a href="https://github.com/lagadic/visp" target="_parent">https://github.com/lagadic/visp</a></p>
 
 <p>If you have any problems or find any bugs, please report them in 
 <a href="https://github.com/lagadic/visp/issues">the bug tracker</a>. If you may need help, please use the available <a href="http://gforge.inria.fr/forum/?group_id=397" target="_parent">forums</a>.<p>