fixed error for rubygems in Gemfile and bug in qed --help

.gitignore

@@ -8,4 +8,4 @@ web/
 work/sandbox/
 *.lock
 *.gem
-
+.rvmrc

Gemfile

@@ -1,2 +1,2 @@
-source :rubygems
+source "https://rubygems.org"
 gemspec

README.md

@@ -1,5 +1,6 @@
 # Ruby Q.E.D.
 
+
 [Homepage](http://rubyworks.github.com/qed) /
 [Documentation](http://rubydoc.info/gems/qed/frames) /
 [Report Issue](http://github.com/rubyworks/qed/issues) /

demo/12_ignore_non_ruby_code_blox.md

@@ -0,0 +1,28 @@
+ # Ignore Non Ruby Code
+
+Which can be indicated by a markdown \`\`\`elixir string e.g
+
+    count = 0
+
+Now we increment it
+
+```elixir
+    count = count + 1
+```
+
+or not?
+
+```
+    count.assert.zero?
+    count += 1
+```
+
+but  
+
+```ruby
+    count += 1
+```
+
+worx
+
+    count.assert == 2 

lib/qed/cli/qed.rb

@@ -10,9 +10,9 @@ class Session
     #
     # Session settings are passed to `Session.new`.
     #
-    #def self.settings
-    #  @settings ||= Settings.new
-    #end
+    def self.settings
+      @settings ||= Settings.new
+    end
 
     #
     # Command line interface for running demos.
@@ -56,8 +56,8 @@ def self.cli(*argv)
 
       options = cli_parse(argv)
 
-      settings = Settings.new(options)
-      session  = Session.new(settings)
+      @settings = Settings.new(options)
+      session  = Session.new(@settings)
       success  = session.run
 
       exit -1 unless success
@@ -143,7 +143,7 @@ def self.cli_parse(argv)
           unless settings.profiles.empty?
             puts "Available Profiles:"
             #require 'confection'
-            QED.profiles.each do |name|
+            settings.profiles.each do |name|
               next if name.strip == ''
               puts "    -p #{name}"
             end

lib/qed/parser.rb

@@ -103,20 +103,31 @@ def parse
       indented = false
       explain  = []
       example  = [] #Step.new(file)
+      foreign  = false # we are inside a foreign language block, e.g. ^```livescript or ^```elixir, but **not** ^```ruby or ^```$
 
+      # TODO: I would not accept the PR like this, but I am willing to refactor this
       lines.each do |lineno, line|
         case line
         when /^\s*$/  # blank line
+          next if foreign
           blank = true
           if indented
             example << [lineno, line]
           else
             explain << [lineno, line]
           end
         when /\A\s+/  #/\A(\t|\ \ +)/  # indented
+          next if foreign
           indented = true
           blank    = false
           example << [lineno, line]
+        # Can we just escape other language blox?
+        when /\A```ruby/
+          foreign = false
+        when /\A```\s*\z/
+          foreign = false
+        when /\A```\S/
+          foreign = true
         else
           if indented or blank
             steps << Step.new(demo, explain, example, steps.last)