Hanami contributors

All nickgnd commits

Fix sample code in Action Parameters guidehanami.github.io
Update copyright to 2017hanami
Update copyright to 2017 [ci skip]view
Update copyright to 2017 [ci skip]utils
Update copyright to 2017 [ci skip]validations
Update copyright to 2017model
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Add new talks from RubyConfAU and NYC.rb meetupcommunity
[Talks] Add link to "Lessons Learned While Building Hanami" videocommunity
Update copyright to 2017helpers
Update copyright to 2017 [ci skip]mailer