What started with a phone call two years ago may end in a tweet early next year. The changes in the relationship between the U-S and Cuba have been dramatic and quiet, slow and significant since Dec. 17, 2014 when President Barack Obama began a new strategy of engagement with Cuba. Travel restrictions on Americans visiting the island have been relaxed. The amount and type of stuff that can be imported and exported to and from the island have been expanded. Limitations on who can send remittances