drop lib folder in favor of composer loading

This commit moves the PclZip library from lib to composer, which installs it to the vendor dir. An update from 2.8.0 to 2.8.2 is implied, as that is the current version
let's work around those submodule problems 1/N
let's work around those submodule problems 2/N
let's work around those submodule problems 3/N
fix submodule problems 4
fix submodule problems 5 FINALLY
Merge pull request #7 from rwchhs/develop

drop lib folder in favor of composer loading