Initial commit.

src/main/java/org/gitlab4j/api/utils/UrlEncoder.java

+package org.gitlab4j.api.utils;
+
+import java.net.URLEncoder;
+
+import org.gitlab4j.api.GitLabApiException;
+
+public class UrlEncoder {
+
+    /**
+     * URL encodes a String in compliance with GitLabs special differences.
+     *
+     * @param s the String to URL encode
+     * @return the URL encoded strings
+     * @throws GitLabApiException if any exception occurs
+     */
+    public static String urlEncode(String s) throws GitLabApiException {
+
+        try {
+            String encoded = URLEncoder.encode(s, "UTF-8");
+            // Since the encode method encodes plus signs as %2B,
+            // we can simply replace the encoded spaces with the correct encoding here 
+            encoded = encoded.replace("+", "%20");
+            encoded = encoded.replace(".", "%2E");
+            encoded = encoded.replace("-", "%2D");
+            encoded = encoded.replace("_", "%5F");
+            return (encoded);
+        } catch (Exception e) {
+            throw new GitLabApiException(e);
+        }
+    }
+}