Fix potential issues when shader path is missing a terminal /
Merge pull request #24 from gergondet/topic/FixMissingSlashInResources

Fix potential issues when shader path is missing a terminal /
Merge branch 'hydro-devel' of github.com:pal-robotics/perception_blort into hydro-devel
Add an ImageProcessor test

Runs all algorithm in IP on an image and save the output
Solve initialization issue in sobel fragment shader