include public dir in built gem

Author: benbalter

jekyll-admin.gemspec

@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
     raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
   end
 
-  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(\.|spec|src|tools|script|docs)/}) }
+  spec.files         = Dir.glob("lib/**/*").concat(%w(LICENSE README.md))
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]