Added a couple of tests
PomodoroApi is not a singleton anymore :)
Moved api to its package
Moved stats to its own file
Private attribute constructor
Added stats test case
Created more stats tests
Added more Stats tests
Improved comments and increment is simpler
Tested increment counter
Forgot to uncomment this code
Fixed reset test and added next day test
Added toString test
Test for getProjects
Moved MockPreferences and tested save
Merge pull request #20 from DiogoNeves/feature/tests

Created main test units and finished testing Stats