Commented md5.
Fixed param of md5.
Added documentation of Content-MD5.
Added base64 algorithm.
Added unit tests for base64.
Fixed documentation of Content-MD5.
Fixed parsing the parameters of a media type.
Improved media type unit test.
Added function is_valid_quoted_string_character.
Parameter values of media types could be quoted strings also.
Added unit test for is_valid_quoted_string_character.
Fixed errornous return values of characters that are above 0x7F.
Add write access to the string and size method to push_back_string.
Lower header key after parsing it.
Removed transformation function from parse_word.
Added function to parse comments.
Fixed parse_comment.
Added unit tests for parse_word, parse_quoted_string and parse_comment.
Added persist as alias for keep-alive for connection header type.
Added documentation for Content-Type and Date.