Merge pull request #20 from vapor/cache-settable

make cache publicly settable

Author: loganwright

Sources/Leaf/Stem.swift

@@ -1,7 +1,7 @@
 public final class Stem {
     public let workingDirectory: String
+    public var cache: [String: Leaf]?
     public fileprivate(set) var tags: [String: Tag] = defaultTags
-    public fileprivate(set) var cache: [String: Leaf]?
 
     public init(workingDirectory: String, cache: [String: Leaf]? = [:]) {
         self.workingDirectory = workingDirectory.finished(with: "/")