Merge remote-tracking branch 'origin/TLD/VOT2015_Datasets_Support' into TLD/VOT2015_Datasets_Support

Conflicts:
	modules/datasets/src/track_vot.cpp
	modules/tracking/include/opencv2/tracking/tracker.hpp

Sample has been renamed: tld_test.cpp->tracker_dataset.cpp
Updated to read parameters from cmd:
-Algorithm name
-Root dataset path
-Dataset ID
-Number of targets to track

Sample has been renamed: tld_test.cpp->tracker_dataset.cpp
Updated to read parameters from cmd:
-Algorithm name
-Root dataset path
-Dataset ID

Sample has been renamed: tld_test.cpp->tracker_dataset.cpp
Updated to read parameters from cmd:
-Algorithm name
-Root dataset path
-Dataset ID
-Number of targets to track

Sample has been renamed: tld_test.cpp->tracker_dataset.cpp
Updated to read parameters from cmd:
-Algorithm name
-Root dataset path
-Dataset ID