I was able to compile vlam only after changing 

 rosinstall ~/MYDIR /opt/ros/cturtle
https://code.ros.org/svn/wg-ros-pkg/branches/trunk_cturtle/rosinstall_files/cturtle/vslam-cturtle-base-overlay.rosinstall


to 

 rosinstall ~/MYDIR /opt/ros/unsturble
https://code.ros.org/svn/wg-ros-pkg/branches/trunk_cturtle/rosinstall_files/cturtle/vslam-cturtle-base-overlay.rosinstall

Also, it's impossible to run demo bag. 
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