v0.4.0

• Fix for issue #122 referencing defined class within another defined class
  • Also fixes accessing scoped functions within a defined class.
• Fix for issue #119 window was removed from the nools.js file now it is called in the current scope of this.
• Allow session.halt even for match() #143 - @raymondfeng
  • Now if you call halt() even if you did not call matchUntilHalt()
• Now you can use a function as a constraint (Only applies to rules defined programatically) #142 - @raymondfeng
• You can now define types using scope #142 - @raymondfeng
• Fix for issue, is the dsl you do not have to escape \ characters #123