Updated gchart engine so that gem is only loaded when necessary

lib/graphs/engines/gchart.rb

@@ -1,5 +1,3 @@
-require 'gchart'
-
 module MetricFu
   module GchartGrapher
     COLORS = %w{009999 FF7400 A60000 008500 E6399B 344AD7 00B860 D5CCB9}    
@@ -23,6 +21,14 @@ def determine_y_axis_scale(values)
 
   class Grapher
     include MetricFu::GchartGrapher
+
+    def self.require_graphing_gem
+      require 'gchart'
+    rescue LoadError
+      puts "#"*99 + "\n" +
+           "If you want to use google charts for graphing, you'll need to install the googlecharts rubygem." +
+           "\n" + "#"*99
+    end
   end
 
   class FlayGchartGrapher < FlayGrapher
@@ -57,7 +63,7 @@ def graph!
         :filename => File.join(MetricFu.output_directory, 'flog.png'))
     end
   end
-
+  
   class RcovGchartGrapher < RcovGrapher
     def graph!
       determine_y_axis_scale(self.rcov_percent)

lib/graphs/grapher.rb

@@ -1,4 +1,11 @@
 module MetricFu
   class Grapher
+    def initialize
+      self.class.require_graphing_gem
+    end
+
+    def self.require_graphing_gem
+      # to be overridden by charting engines
+    end
   end
 end

lib/templates/awesome/awesome_template.rb

@@ -8,7 +8,6 @@ def write
 
     # Copy Bluff javascripts to output directory
     Dir[File.join(this_directory, '..', 'javascripts', '*')].each do |f|
-      puts "Copying #{f} to #{File.join(MetricFu.output_directory, File.basename(f))}"
       File.copy(f, File.join(MetricFu.output_directory, File.basename(f)))
     end