Storage configuration modified

[CristianMG]

• Modified storage configuration, now is a strategy pattern.
• Now library is easy to mock and test.
• Modified documentation to fit with the new changes.
• Extract a function to FileUtils to be used inside a strategy
• Created the same behaviours than library had but were converted a implementation of interface.
• Created a new behaviour default which save file in cache directory to avoid overflow data saved in intern storage
• Now strategy allow to join the behaviours, some structure controls that were removed