[Template] Expose token parser

Stencil/Context.swift

@@ -8,6 +8,10 @@ public class Context : Equatable {
         dictionaries = [dictionary]
     }
 
+    public init() {
+        dictionaries = []
+    }
+
     public subscript(key: String) -> AnyObject? {
         get {
             for dictionary in reverse(dictionaries) {

Stencil/Template.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 public class Template {
-    let parser:TokenParser
+    public let parser:TokenParser
 
     public convenience init?(named:String) {
         self.init(named:named, inBundle:nil)
@@ -45,4 +45,9 @@ public class Template {
                 return .Error(error:error)
         }
     }
+
+    public func render() -> Result {
+        let context = Context()
+        return render(context)
+    }
 }