Adds basic support for the Swift programming language

Text only lexer for now until Pygments catches up

samples/Swift/section-41.swift

@@ -0,0 +1,13 @@
+func hasAnyMatches(list: Int[], condition: Int -> Bool) -> Bool {
+    for item in list {
+        if condition(item) {
+            return true
+        }
+    }
+    return false
+}
+func lessThanTen(number: Int) -> Bool {
+    return number < 10
+}
+var numbers = [20, 19, 7, 12]
+hasAnyMatches(numbers, lessThanTen)