Issue #35 fixed: Save does not delete annotation in server.
Incidentaly, I also added a class header and an isSaved method
Merge pull request #20 from jihoonl/master

bigger view facing text. and color is white
Add a world collection class, accomplishing issue #15 for the C++ lib
Show labels with the same color as the markers, for aesthetic reasons
add c++11 flag for compilation.
Merge pull request #21 from jihoonl/patch-1

add c++11 flag for compilation.