Export/Import Contacts

This feature adds two buttons to the Contacts GUI to export and import the list of contacts with all their information to a JSON file for backup or migration purposes.

Considered in this code:

• Import of duplicated/existing contacts

• Manually tested

  • export, import and import with some duplicates with small sets of contacts

  • Firefox v34 & Chrome v39

  • Contact names containing spaces and Spanish specific characters

Not included in this code:

• Automated testing of backup/importing (is there any framework setup for this?)

• Internationalization (error messages and button translations)