Created branch for scramble optimization, 
added plan for the optimization
Added tier id and name to the Tier object moving them awai from the
cloud service object. 
Fixed scramble bug that caused memory filter to give an empty set of
resources.
Implemented roulette selection for scramble. 
Added long term memory with frequency to avoid cycles due to tabu list. 
Fixed progress bar in optimization window
Added some more feedback to the user, refreshed images removing old
values when number of evaluation increases, close connection and
evaluators on exit
updated integration with LINE
updated integration with LINE
initial implementation of integation with MILP solver
Fixed integration with MILP, 
Improved integration with LINE so that it is launched only once before
calling Palladio evaluation of the initial solution
up