Fix included gem files

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    simpleblog (0.0.3)
+    simpleblog (1.0.0)
       redcarpet
       rouge
 

simpleblog.gemspec

@@ -1,11 +1,15 @@
 Gem::Specification.new do |s|
   s.name = "simpleblog"
-  s.version = "0.0.3"
+  s.version = "1.0.0"
   s.summary = "Helpers to generate markdown blog pages using Rails"
   s.description = "Create a simple blog that can be edit with markdown"
   s.authors = ["Caroline Salib"]
   s.email = "[email protected]"
-  s.files = ["lib/simpleblog.rb"]
+  s.files = Dir.glob("{lib}/**/*")
+  s.files += ["simpleblog.gemspec"]
+  s.bindir = "exe"
+  s.executables = s.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
+  s.require_paths = ["lib"]
   s.homepage = "https://rubygems.org/gems/simpleblog"
   s.metadata = {"source_code_uri" => "https://github.com/carolinesalib/simpleblog"}
   s.license = "MIT"