Updates to eddy tracking. Added finding of closest maxima and some other criteria to improve detection.

Signed-off-by: deepak <dpak.cherian@gmail.com>
Changed track_eddy.m to function

Signed-off-by: deepak <dpak.cherian@gmail.com>
Misc. scripts : one to find shelfbreak & one to backup script.

Signed-off-by: deepak <dpak.cherian@gmail.com>
Added more diagnostics to eddy tracking.

Signed-off-by: deepak <dpak.cherian@gmail.com>