Extend work by limiting files required for bundling gem

.gitignore

@@ -10,3 +10,4 @@ spec/db/data_schema.rb
 .ruby-version
 .idea/
 vendor/
+Gemfile.lock

data_migrate.gemspec

@@ -15,6 +15,11 @@ Gem::Specification.new do |s|
 
   s.rubyforge_project = "data_migrate"
 
+  s.files         = Dir["{lib,tasks}/**/*", "Changelog.md", "LICENSE", "README.md"]
+  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
+  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
+  s.require_paths = ["lib"]
+
   %w[
     activerecord
     railties
@@ -32,10 +37,4 @@ Gem::Specification.new do |s|
   s.add_development_dependency "timecop"
   s.add_development_dependency "rubocop"
   s.add_development_dependency "overcommit"
-
-
-  s.files         = `git ls-files`.split("\n")
-  s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
-  s.require_paths = ["lib"]
 end