interface LinkCosts moved to under emblcmci.linker.costfunctions
moved all scripts to under src/test/scripts
test jython script added. 
DotLinkerHeadless.java.
gitignore added with pydev related eclipse config file.
Created new classes Node and Track under emblcmci.obj. Both were
originally inner class of ViewDynamics class, but for generality they
were taken out. Also for thinking about how to design objects in the
tools, and to integrate them.
tracking using points derived by Maxima finder is not working from
jython script.