added implementation of large blob splitting based on expected position of the blobs;
fixed a bug in human detector when FilledImage captured parts of neighbour blobs
added markup for the lane separators
changed swimmer detection to base on skin and lane separators colors (instead of water color);
added merging of small blobs in swimmer detection;
moved blobs detection functionality into swimmer observer
blobs merging with world area constraints;
prohibited closely positioned swimmers;
fixed each test method initialization
added swimmer detector tests
changed camera matrix initialization moved to the app code
Merge branch 'develop'