Add license header to contributed files

src/wand/magick.rs

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2016 Mattis Marjak
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 use std::fmt;
 use std::ptr;
 use std::ffi::{CStr, CString};
@@ -36,7 +51,7 @@ impl MagickWand {
         let c_value = CString::new(value).unwrap();
         let result = unsafe {
             bindings::MagickSetOption(self.wand, c_key.as_ptr(), c_value.as_ptr())
-        }; 
+        };
         match result {
             bindings::MagickTrue => Ok(()),
             _ => Err("failed to set option"),