In accordance with recommendations at
http://www.apache.org/licenses/LICENSE-2.0.html.

A number of classes had strayed from this format, now all
are the same.

SPR-7789 - FormHttpMessageConverter does not honor the charset in the content type when writing a form and uses a wrong default charset

SPR-7789 - FormHttpMessageConverter does not honor the charset in the content type when writing a form and uses a wrong default charset

added XmlAwareFormHttpMessageConverter, taking over the 3.0.2-introduced XML multipart support (avoiding a package cycle)

relaxed generic Class declaration in HttpMessageConverter's canRead/canWrite/read signatures (SPR-6848)

HttpMessageConverter.write() now allows for a specific content type.

- Added separate exceptions for reading and writing HttpMessages