Version 2

[m-vo]

This introduces some breaking changes to RealEstate objects:

• numberOfRooms now is a float (was int)
• freeFromYear (int) was removed, use freeFrom instead (string)
• the createdAt and modifiedAt properties now are a string as received from the API
• all decimal values are treated as a string

Synchronizer improvements:

• real estate types from the API are now casted and won't rely on being the correct type anymore
• the computed changes for updated entities now are displayed (if there are any)
• the updating of item timestamps is now more robust (only occurs on changes, see above)
• the number of untouched items now will be reported as well
• whether an item will be updated or does not depends on its "modified date" anymore