Add echoe dep

Author: kanwei

Rakefile

@@ -7,6 +7,7 @@ Echoe.new('algorithms') do |p|
   p.summary              = 'A library of algorithms and data structures (containers).'
   p.url                  = 'https://rubygems.org/gems/algorithms'
   p.version              = "0.4.0"
+  p.retain_gemspec       = true
   p.runtime_dependencies = []
-  p.development_dependencies = ["rspec"]
+  p.development_dependencies = ["rspec", "echoe"]
 end

algorithms.gemspec

@@ -24,10 +24,13 @@ Gem::Specification.new do |s|
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_development_dependency(%q<rspec>, [">= 0"])
+      s.add_development_dependency(%q<echoe>, [">= 0"])
     else
       s.add_dependency(%q<rspec>, [">= 0"])
+      s.add_dependency(%q<echoe>, [">= 0"])
     end
   else
     s.add_dependency(%q<rspec>, [">= 0"])
+    s.add_dependency(%q<echoe>, [">= 0"])
   end
 end