Revert "Move tag generation"

This reverts commit 1d6a4f7.

Author: bitbrain

lib/_tag_gen.rb renamed to _plugins/_tag_gen.rb

@@ -2,16 +2,16 @@
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-dash"
-  spec.version       = "1.0.3"
+  spec.version       = "1.0.2"
   spec.authors       = ["Miguel Gonzalez Sanchez"]
   spec.email         = ["[email protected]"]
 
   spec.summary       = "A dark UI theme for Jekyll, inspired by Dash UI for Atom."
   spec.homepage      = "https://bitbrain.github.io/jekyll-dash"
   spec.license       = "MIT"
 
-  spec.files         = `git ls-files -z`.split("\x0").select { |f| f.match(%r!^(assets|_layouts|_includes|_plugins|_sass|LICENSE|README|_tag_gen)!i) }
-  spec.require_paths = ["lib"]
+  spec.files         = `git ls-files -z`.split("\x0").select { |f| f.match(%r!^(assets|_layouts|_includes|_plugins|_sass|LICENSE|README)!i) }
+
   spec.add_runtime_dependency "jekyll", "~> 3.5"
   spec.add_runtime_dependency "jekyll-feed", "~> 0.9"
   spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.1"