Merge from cocoatutorials/gso13trunk

git-svn-id: svn://dev.exiv2.org/svn@3114 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
removing src/*.hpp

git-svn-id: svn://dev.exiv2.org/svn@3115 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3
removed msvc2012/.  This won't be needed in 0.25.

git-svn-id: svn://dev.exiv2.org/svn@3116 b7c8b350-86e7-0310-a4b4-de8f6a8f16a3