Add ReactComponentB.configureSpec

Squashed commit of the following:

commit f5c4d20
Merge: e94bcf8 db95d22
Author: chandu0101 <chandu.csu2010@gmail.com>
Date:   Mon Jun 15 17:13:24 2015 +0530

    Merge branch 'unsfasespec' of https://github.com/chandu0101/scalajs-react into unsfasespec

commit e94bcf8
Author: chandu0101 <chandu.csu2010@gmail.com>
Date:   Sat Jun 13 13:39:05 2015 +0530

    add configureSpec to ReactComponentB

    add unsafeSpec to ReactComponentB

    add configureSpec tp ReactComponentB

commit db95d22
Author: chandu0101 <chandu.csu2010@gmail.com>
Date:   Mon Jun 15 16:32:11 2015 +0530

    add configureSpec tp ReactComponentB

commit a1a3d41
Author: chandu0101 <chandu.csu2010@gmail.com>
Date:   Sat Jun 13 13:39:05 2015 +0530

    add unsafeSpec to ReactComponentB

commit 096859e
Author: chandu0101 <chandu.csu2010@gmail.com>
Date:   Sat Jun 13 13:33:20 2015 +0530

    add unsafeSpec to ReactComponentB

core/src/main/scala/japgolly/scalajs/react/ReactComponentB.scala

@@ -76,6 +76,7 @@ object ReactComponentB {
 
   // ===================================================================================================================
   private[react] case class LifeCycle[P,S,B,N <: TopNode](
+    configureSpec            : UndefOr[ReactComponentSpec[P, S, B, N]       => Unit],
     getDefaultProps          : UndefOr[()                                   => P],
     componentWillMount       : UndefOr[ComponentScopeU[P, S, B]             => Unit],
     componentDidMount        : UndefOr[ComponentScopeM[P, S, B, N]          => Unit],
@@ -86,7 +87,7 @@ object ReactComponentB {
     shouldComponentUpdate    : UndefOr[(ComponentScopeM[P, S, B, N], P, S)  => Boolean])
 
   private[react] def emptyLifeCycle[P,S,B,N <: TopNode] =
-    LifeCycle[P,S,B,N](undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined)
+    LifeCycle[P,S,B,N](undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined, undefined)
 }
 
 import ReactComponentB.LifeCycle
@@ -109,6 +110,9 @@ final class ReactComponentB[P,S,B,N <: TopNode](val name: String,
   @inline private implicit def lcmod(a: LifeCycle[P, S, B, N]): ReactComponentB[P, S, B, N] =
     copy(lc = a)
 
+  def configureSpec(modify: ReactComponentSpec[P, S, B, N] => Unit): ReactComponentB[P, S, B, N] =
+       lc.copy(configureSpec = modify)
+
   def configure(fs: (ReactComponentB[P, S, B, N] => ReactComponentB[P, S, B, N])*): ReactComponentB[P, S, B, N] =
     fs.foldLeft(this)((a,f) => f(a))
 
@@ -189,7 +193,6 @@ final class ReactComponentB[P,S,B,N <: TopNode](val name: String,
       lc.getDefaultProps.foreach(f => spec.updateDynamic("getDefaultProps")(f: Function))
       lc.componentWillUnmount.foreach(f => spec.updateDynamic("componentWillUnmount")(f: ThisFunction))
       lc.componentDidMount.foreach(f => spec.updateDynamic("componentDidMount")(f: ThisFunction))
-
       setFnPS(lc.componentWillUpdate, "componentWillUpdate")
       setFnPS(lc.componentDidUpdate, "componentDidUpdate")
       setFnPS(lc.shouldComponentUpdate, "shouldComponentUpdate")
@@ -204,6 +207,7 @@ final class ReactComponentB[P,S,B,N <: TopNode](val name: String,
         spec.updateDynamic("mixins")(mixins)
       }
 
+      lc.configureSpec.foreach(_(spec.asInstanceOf[ReactComponentSpec[P, S, B, N]]))
       spec.asInstanceOf[ReactComponentSpec[P, S, B, N]]
     }