update .travis.yml
stereo_synchronizer: catkinize
opt_camera: catkinize
jsk_tools: catkinize, add cmake/download_package.cmake
multi_map_server: catkinize
downward: catkinize
jsk_data: add ssh -o StrictHostKeyChecking=no
rosping: add depends to mk, rosbuild
posedetection_msgs: add depends to _generate_messages_cpp
jsk_topic_tools: add depends to roscpp_tutorials
pr2_teleop_general_jsk_patch: check if pr2_msgs exists
openni_tracker_jsk_patch: use upstream repository on github
laser_filters_jsk_patch: download laser_filters, filters
image_view_jsk_patch: catkinize (dummy)
image_view2: add depends to image_proc
depth_image_proc_jsk_patch: catkinize (dummy)