Use SpecCoverage instead of ugly environment variables.

Rakefile

@@ -1,12 +1,2 @@
 #!/usr/bin/env rake
 require "bundler/gem_tasks"
-require "rspec/core/rake_task"
-
-RSpec::Core::RakeTask.new(:spec)
-
-task :default => :spec
-
-task :cov do
-  ENV["coverage"] = "true"
-  Rake::Task[:spec].invoke
-end

cameraplus.gemspec

@@ -21,4 +21,5 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "rspec"
   gem.add_development_dependency "webmock"
   gem.add_development_dependency "simplecov"
+  gem.add_development_dependency "spec_coverage"
 end

spec/spec_helper.rb

@@ -1,8 +1,3 @@
-if ENV["coverage"]
-  require "simplecov"
-  SimpleCov.start
-end
-
 require "cameraplus"
 require "vcr_config"