Merge branch 'master', remote-tracking branch 'upstream/master'
Integrate image processing module implemented using actionlib
Merge branch 'master' of https://github.com/iit-kgp-auv-team/kraken_3.0
Merge pull request #21 from routeaccess/master

Integrate image processing module rewritten using actionlib
added launch file for kraken launch
- Update .gitignore to add *~
- Remove files that fit the criteria
- Modifying buoy_detect module to subscribe to image_transport topic 'videofeed'
- Renaming loaded-video topic name to 'videofeed' in videoread module
- Removing extra .gitignore, *~ files from vision_stack module
- Moving spinOnce() & sleep() to the end of loop in image_subscribe module
Merge branch 'master' of https://github.com/iit-kgp-auv-team/kraken_3.0