Code review modifs; partial
Merge remote-tracking branch 'origin/master' into copy-init-data
Rearrangement of application (more functions created in start()), more
options input for user, menu added, version added
Code reorganize (according to activity diagram); Tests using Mockito
Small modification for option 2, hit key for the user
Merge pull request #5 from gabriela-spiescu/copy-init-data

v2; major modifications; cf. diagram