I am used to Magento 1.x, now It's really confusing to understand the Magento 2.0.x structure.
I am trying to do it. Please help me to understand what is the function of the following folders below vender (Except magento folder)
( bin, braintree, composer, doctrine, fabpot, justinrainbow, league, lusitanian, monolog, oyejorge, pdepend, pelago, phpmd, phpseclib, phpunit, psr, sebastian, seld, sjparkinson, squizlabs, symfony, tedivm, tubalmartin, zendframework )
Is that related to our development? Or those are just some Library files, which need to be keep there?