Implement vote package component

[selankon]

Use a better visualization for vote package:

• On the vote transaction details, show the vote package {"votes":[1]} not in raw format but some more human friendly format.
• This above is a nice feature to have on the verify vote page

[selankon]

Example of vote packages for different election types:

• Multichoice election {"nonce":"da9aba06ceebf065","votes":[3,0,4,5]}: meaning option 3 selected, option 0 selected, option 4 selected and option 5 selected
• Approval {"nonce":"67ae8c35bf24ee3a","votes":[0,1,1,1]}, option 0 votes 0, options 1, 2 and 3: 1 vote
• Single choice election {"nonce":"7f25c7cf554b66dc","votes":[3]}, option 3
• Multiple question election {"nonce":"7698a4b809af7bad","votes":[3,1]}, first quest. option 3, second quest. option 1