Encoding fixes:

- base64 library renamed to encode library
- Moved urlencode/urldecode functions from HTTP library to encode library
- Moved hex/unhex functions from HTTP library to encode library
- Added urldecode support to RTMP urls, fixing XSplit wildcard stream support

lib/encode.h

@@ -0,0 +1,39 @@
+#pragma once
+#include <string>
+
+/// Namespace for character encoding functions and classes
+namespace Encodings {
+
+  /// Holds base64 decoding and encoding functions.
+  class Base64 {
+    private:
+      static const std::string chars;
+      static inline bool is_base64(unsigned char c);
+    public:
+      static std::string encode(std::string const input);
+      static std::string decode(std::string const & encoded_string);
+  };
+
+  /// urlencoding and urldecoding functions
+  class URL {
+    public:
+      /// urldecodes std::string data, parsing out both %-encoded characters and +-encoded spaces.
+      static std::string decode(const std::string & in);
+      /// urlencodes std::string data, leaving only the characters A-Za-z0-9~!&()' alone.
+      static std::string encode(const std::string & c);
+
+  };
+
+  /// Hexadecimal-related functions
+  class Hex {
+    public:
+    /// Decodes a single hexadecimal character to integer, case-insensitive.
+    static inline int ord(char c){
+      return ((c&15) + (((c&64)>>6) | ((c&64)>>3)));
+    }
+    /// Encodes a single character as two hex digits in string form.
+    static std::string chr(char dec);
+  };
+
+}
+