move var metadata from LambdaInfo.ast to fields of LambdaInfo

LambdaInfo.ast is now LambdaInfo.code, and is just an array of
statements

base/expr.jl

@@ -139,7 +139,7 @@ end
 
 function popmeta!(body::Expr, sym::Symbol)
     body.head == :block || return false, []
-    found, metaex = findmeta_block(body)
+    found, metaex = findmeta_block(body.args)
     if !found
         return false, []
     end
@@ -157,23 +157,29 @@ function popmeta!(body::Expr, sym::Symbol)
     false, []
 end
 popmeta!(arg, sym) = (false, [])
+function popmeta!(body::Array{Any,1}, sym::Symbol)
+    ex = Expr(:block); ex.args = body
+    popmeta!(ex, sym)
+end
 
 function findmeta(ex::Expr)
     if ex.head == :function || (ex.head == :(=) && typeof(ex.args[1]) == Expr && ex.args[1].head == :call)
         body::Expr = ex.args[2]
         body.head == :block || error(body, " is not a block expression")
-        return findmeta_block(ex)
+        return findmeta_block(ex.args)
     end
     error(ex, " is not a function expression")
 end
 
-function findmeta_block(ex::Expr)
-    for a in ex.args
+findmeta(ex::Array{Any,1}) = findmeta_block(ex)
+
+function findmeta_block(exargs)
+    for a in exargs
         if isa(a, Expr)
             if (a::Expr).head == :meta
                 return true, a::Expr
             elseif (a::Expr).head == :block
-                found, exb = findmeta_block(a)
+                found, exb = findmeta_block(a.args)
                 if found
                     return found, exb
                 end