* pkgs: refactor needless quoting of homepage meta attribute
A lot of packages are needlessly quoting the homepage meta attribute
(about 1400, 22%), this commit refactors all of those instances.
* pkgs: Fixing some links that were wrongfully unquoted in the previous
commit
* Fixed some instances
Scrapy is usually installed via pip where copying all permissions
makes sense. In Nix the files copied are owned by root and
readonly. As a consequence scrapy can't edit the project templates so
scrapy startproject
fails.